FENDER Patented Callus Builder & Finger Strengthener – Resistance Finger Exerciser for Guitar, Bass & Violin – Guitar Finger Trainer & Grip Strength Tool – Ideal Guitar & Bass Accessories (Tensions: RED=8-Lbs; BLACK=15-Lbs)
$19.99
Musical instrument parts and accessories Sold by Cognatus Innovations, LLC Fulfilled by Amazon

FENDER Patented Callus Builder & Finger Strengthener – Resistance Finger Exerciser for Guitar, Bass & Violin – Guitar Finger Trainer & Grip Strength Tool – Ideal Guitar & Bass Accessories (Tensions: RED=8-Lbs; BLACK=15-Lbs)

GHS 347 delivered to Accra est.

Estimate for one unit, air shipping. Final total is confirmed at checkout.

Product arrives warehouse Sep 24, 2026. Products ship from our warehouse every Friday. Delivered to you by Oct 6, 2026.

Quantity
1
Size
Color

About this item

Building Calluses is essential for playing a stringed instrument Over 2 million new people start playing a stringed instrument each year. Twelve months later, 90% stop. The number one reason for stopping is pain from lack of calluses and finger strength. We designed the Fender Callus Builder and Finger Strengthener to help in both these areas. Easily simulate the exact angle you play your instrument Unlike most finger exercisers, the Fender Callus Builder can be held at different angles, allowing the user to exercise at the same angle that they play their instrument. What Strength is Right for Me? The Fender Callus Builder is available at two tensions, Red=8-lbs and Black=15-lbs. These tensions were measured by a force gauge applied between the first and second outer raised edges. If you move your fingers closer to the center, the tension increases. For example, if the User applies pressure between the third and fourth raised edges, the tension will be 50% higher. We are not aware of any other finger exerciser offering 15-lbs of tension, as well as the flexibility to increase the tensions to over 20-lbs by simply moving your fingers closer to the center. For beginners, the Red Perfect Pinch will suffice. As you strengthen and improve, it will be time for the Black Perfect Pinch. For experienced Musicians, and Bass players, you will want the Black Fender Callus Builder. We do offer a combo package at a discounted.

Condition

New
$19.99

FENDER Patented Callus Builder & Finger Strengthener – Resistance Finger Exerciser for Guitar, Bass & Violin – Guitar Finger Trainer & Grip Strength Tool – Ideal Guitar & Bass Accessories (Tensions: RED=8-Lbs; BLACK=15-Lbs) · x1

Sign in to add to cart

Similar Items

Fantastic Finger Guide for Violins Adult Beginner | Stringed Musical Instruments | Fingerboard and Fretboard Stickers for Learning All Notes | Play or Fiddle, 4/4-Size -5%

Fantastic Finger Guide for Violins Adult Beginner | Stringed Musical Instruments | Fingerboard and Fretboard Stickers for Learning All Notes | Play or Fiddle, 4/4-Size

$9.45

$9.95

Saxophone Sax Black Double Shoulder Strap for Baritone Alto Tenor Soprano Sax,Super Fiber,Metal Hook,Musical Instruments Accessories Parts

Saxophone Sax Black Double Shoulder Strap for Baritone Alto Tenor Soprano Sax,Super Fiber,Metal Hook,Musical Instruments Accessories Parts

$19.99

Anrher 25pcs Mini Musical Instruments Decoration Piano Violin Trumpet Guitar Saxophone Drum Dollhouse Accessory Sets

Anrher 25pcs Mini Musical Instruments Decoration Piano Violin Trumpet Guitar Saxophone Drum Dollhouse Accessory Sets

$18.88

EASTROCK Alto Sax Neck Cork, 5pcs Universal Saxophone Neck Cork, Alto Sax Joint Cork Sheet, Saxophone Cork Replacement Kit for Alto Saxophone

EASTROCK Alto Sax Neck Cork, 5pcs Universal Saxophone Neck Cork, Alto Sax Joint Cork Sheet, Saxophone Cork Replacement Kit for Alto Saxophone

$7.99

Saxophone Repair Screw Kit, 20-Piece, 3mm x 10mm (0.12" x 0.39") | Wind Musical Instrument Parts Accessories,Flat Head Screws for Saxophone Maintenance & Woodwind Repairs -5%

Saxophone Repair Screw Kit, 20-Piece, 3mm x 10mm (0.12" x 0.39") | Wind Musical Instrument Parts Accessories,Flat Head Screws for Saxophone Maintenance & Woodwind Repairs

$9.49

$9.99

HilBeliFU 24Pcs Banjo Hooks Nuts Set, 2.5in Adjustable Metal Banjo Hook Brackets, Chrome Plated Round Hook Parts, Silver Musical Instrument Accessories for Ukulele -3%

HilBeliFU 24Pcs Banjo Hooks Nuts Set, 2.5in Adjustable Metal Banjo Hook Brackets, Chrome Plated Round Hook Parts, Silver Musical Instrument Accessories for Ukulele

$17.37

$17.99

Jersvimc 2Pcs Brass Alto Sax Ligature Gold, for Music Mouthpiece Instrument | Alto Saxophone Ligature, Bass Clarinet Ligatures, Saxophone Accessories Fastener -8%

Jersvimc 2Pcs Brass Alto Sax Ligature Gold, for Music Mouthpiece Instrument | Alto Saxophone Ligature, Bass Clarinet Ligatures, Saxophone Accessories Fastener

$5.49

$5.99

Libretto Microfiber Polish Cloth for Musical Instrument, 3 Sizes in 1 Pack, Trumpet and Brass Cleaning Product, Green, Lint-Free, Super Soft, Gift, for Piano, Violin, Guitar, Saxophone, Laptop. -5%

Libretto Microfiber Polish Cloth for Musical Instrument, 3 Sizes in 1 Pack, Trumpet and Brass Cleaning Product, Green, Lint-Free, Super Soft, Gift, for Piano, Violin, Guitar, Saxophone, Laptop.

$9.49

$9.99

Miwayer Guitar Bone Bridge Pins Real Bone Replacement Parts for 6 & 12 String Acoustic Guitar (Small Abalone Dot)

Miwayer Guitar Bone Bridge Pins Real Bone Replacement Parts for 6 & 12 String Acoustic Guitar (Small Abalone Dot)

$12.89

2Pcs Black Anti Skid Drum Feet Holder, Drum Leg Tip, Professional Percussion Accessory, Drum Feet Floor Tom Legs Parts, Musical Instrument Accessories, Mounting Hardware, Drum Set Mounting Hardware

2Pcs Black Anti Skid Drum Feet Holder, Drum Leg Tip, Professional Percussion Accessory, Drum Feet Floor Tom Legs Parts, Musical Instrument Accessories, Mounting Hardware, Drum Set Mounting Hardware

$5.58

D'Addario PL0095 Plain Steel Guitar Single String, .0095 -19%

D'Addario PL0095 Plain Steel Guitar Single String, .0095

$2.86

$3.54

Black 9V Battery Case Holder Box - Active Bass Guitar Pickup Battery Compartment for Electric Guitar and Bass Accessories - Durable Replacement Cover for Musical Instrument Parts, Slides

Black 9V Battery Case Holder Box - Active Bass Guitar Pickup Battery Compartment for Electric Guitar and Bass Accessories - Durable Replacement Cover for Musical Instrument Parts, Slides

$5.28

Aluminum Alloy Snare Drum Lug - Double End Mount Replacement Hardware for Snare & Small Drums, Stable Tension Support, Lightweight Percussion Parts for Beginners & Professionals, 3.14 x 1.57 x 0.9 -6%

Aluminum Alloy Snare Drum Lug - Double End Mount Replacement Hardware for Snare & Small Drums, Stable Tension Support, Lightweight Percussion Parts for Beginners & Professionals, 3.14 x 1.57 x 0.9

$9.79

$10.49

Bhavicreation Tabla Strap 11 Mtr Tabla L Lacing Dholak Strap Drum Musical Instruments Parts And Accessories

Bhavicreation Tabla Strap 11 Mtr Tabla L Lacing Dholak Strap Drum Musical Instruments Parts And Accessories

$20.99

1Set Yootones Flute maintenance tools kits,Practical DIY Repair Maintenance Kit Set Compatible with Flute Musical Instrument Parts Accessories

1Set Yootones Flute maintenance tools kits,Practical DIY Repair Maintenance Kit Set Compatible with Flute Musical Instrument Parts Accessories

$15.99

Murtenze Violin Bridge, 4/4 3/4 1/2 1/4 1/8 1/16 Full Size, 12 Pack | Maple, Fitted, Replacement Parts

Murtenze Violin Bridge, 4/4 3/4 1/2 1/4 1/8 1/16 Full Size, 12 Pack | Maple, Fitted, Replacement Parts

$6.99

Elegaperma 10 Pcs Ø10 mm Trombone Spit Valve Cork,Inner Dia.4mm Trombone Rubber Stopper, Trombone Water Key Cork, Slide Rubber End Bumper and Trombones Corks Pads for Brass Instrument Maintenance

Elegaperma 10 Pcs Ø10 mm Trombone Spit Valve Cork,Inner Dia.4mm Trombone Rubber Stopper, Trombone Water Key Cork, Slide Rubber End Bumper and Trombones Corks Pads for Brass Instrument Maintenance

$8.99

Weicoca Black Keyboard Music Score Stand - Electronic Sheet Music Stands - Musical Instrument Parts Portable Durable Suitable Organ Holder - Instrument Accessories - Sheet Music Stands

Weicoca Black Keyboard Music Score Stand - Electronic Sheet Music Stands - Musical Instrument Parts Portable Durable Suitable Organ Holder - Instrument Accessories - Sheet Music Stands

$14.99

Taiyin 20 Pcs Spit Valve Cork Trombone Trumpet Cork 9x4mm | Water Key Pads for Brass Instruments, Seals Moisture Prevents Leaks, Storage Box Included, Instrument Repair Accessories Kit

Taiyin 20 Pcs Spit Valve Cork Trombone Trumpet Cork 9x4mm | Water Key Pads for Brass Instruments, Seals Moisture Prevents Leaks, Storage Box Included, Instrument Repair Accessories Kit

$12.99

Lovermusic Sand Block Musical Accessories Parts Wood Color Instruments Sand Blocks Wood Blocks Pack of 2

Lovermusic Sand Block Musical Accessories Parts Wood Color Instruments Sand Blocks Wood Blocks Pack of 2

$15.95

VOSAREA Professional Triangle 10pcs Triangle Iron Sticks Musical Instrument Accessory for Boys and Girls Musicians

VOSAREA Professional Triangle 10pcs Triangle Iron Sticks Musical Instrument Accessory for Boys and Girls Musicians

$11.39

Musical Instruments Set, 15PCS Natural Wooden Percussion Tambourine Maracas Bells Instruments, Educational Music Kit with Storage Bag Birthday -5%

Musical Instruments Set, 15PCS Natural Wooden Percussion Tambourine Maracas Bells Instruments, Educational Music Kit with Storage Bag Birthday

$32.29

$33.99

Civaner 24 Pcs Christmas Dollhouse Miniature Musical Instruments 1:12 Scale | Wide Variety, Realistic Details, Dollhouse Decor, DIY Crafts, Kids Gift -5%

Civaner 24 Pcs Christmas Dollhouse Miniature Musical Instruments 1:12 Scale | Wide Variety, Realistic Details, Dollhouse Decor, DIY Crafts, Kids Gift

$12.79

$13.49

Melissa & Doug Band-in-a-Box Clap! Clang! Tap! - 10-Piece Musical Instrument Set -18%

Melissa & Doug Band-in-a-Box Clap! Clang! Tap! - 10-Piece Musical Instrument Set

$22.10

$26.99