---
product_id: 558796507
title: "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)"
brand: "fender"
price: "142.89 DT"
currency: TND
in_stock: true
category: "Fender"
url: https://www.desertcart.tn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser
store_origin: TN
region: Tunisia
---

# Ergonomic string-like ridges Iconic Stratocaster shape Up to 15-lb resistance 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)

**Brand:** fender
**Price:** 142.89 DT
**Availability:** ✅ In Stock

## Summary

> 🎸 Build strength, calluses & confidence—play like a pro, every day!

## Quick Answers

- **What is this?** 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) by fender
- **How much does it cost?** 142.89 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser)

## Best For

- fender enthusiasts

## Why This Product

- Trusted fender brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Authentic Fender Design:** Stand out with the patented Stratocaster-shaped callus builder—gear that screams credibility.
- • **Ergonomic Play Position:** Designed to mirror your hand’s natural angle for targeted, effective training.
- • **Pro-Level Finger Strength:** Push your limits with up to 15 lbs of resistance for unmatched finger power.
- • **Perfect Gift for Musicians:** Compact, stylish, and essential—ideal for gifting or stocking stuffers that inspire.
- • **Realistic String Simulation:** Raised ridges mimic actual guitar strings to build calluses where it counts.

## Overview

The Fender Patented Callus Builder & Finger Strengthener is a licensed, ergonomically designed finger exerciser shaped like the iconic Stratocaster. Available in 8-lb (red) and 15-lb (black) resistance levels, it features raised ridges that simulate real guitar strings to build finger strength, coordination, and calluses. Perfect for guitar, bass, and violin players seeking daily training or warm-ups, this compact tool is a top-rated accessory that blends function with Fender’s legendary style.

## Description

desertcart.com: FENDER Patented Callus Builder and Finger Strengthener | Resistive Finger Exerciser and Callus Builder. Improve play on Guitar, Bass, Violin. Tensions: RED=8-Lbs; BLACK=15-Lbs : Musical Instruments

## Features

- ESSENTIAL GUITAR & BASS ACCESSORY – From beginners to pros, this must-have guitar finger trainer improves strength, coordination, and endurance—perfect for daily guitar training or warm-ups before a performance.
- LICENSED and PATENTED FENDER CALLUS BUILDER – Designed in the shape of Fender’s iconic Stratocaster, this officially licensed guitar callus builder is a standout in any collection of guitar & bass accessories.
- RAISED STRING-LIKE RIDGES – Unlike typical strength training grip strengtheners, this exclusive patented design includes raised ridges that simulate real string tension to help build calluses—ideal for realistic guitar finger exerciser practice.
- MIRRORS PLAYING POSITION – Ergonomically shaped to replicate your hand and finger angles while playing any stringed instrument, making it a versatile tool to build calluses where you need them
- HIGHEST TENSION AVAILABLE – Choose from 8-lb (RED) or 15-lb (BLACK) resistance. The BLACK version delivers extreme resistance—unmatched by any other guitar finger trainer or hand exerciser on the market.
- PERFECT HOLIDAY GIFT & STOCKING STUFFER – A thoughtful holiday gift that shows you support their musical journey. The ideal add-on for anyone receiving a new guitar! Compact, affordable, and fun to use — musicians of all ages LOVE this in their stocking.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CHBH9YDK |
| Best Sellers Rank | #1,023 in Musical Instruments ( See Top 100 in Musical Instruments ) #4 in Guitar Tools |
| Brand Name | Fender |
| Color | Red |
| Customer Reviews | 4.5 4.5 out of 5 stars (426) |
| Item Shape | Variety |
| Item Type Name | Callus Builder |
| Item Weight | 3 ounces |
| Manufacturer | Barrett Productions, LLC |
| Material | Plastic |
| Model Number | 891922002216 |
| Number of Items | 1 |
| Part Number | 891922992216 |
| Style | Wrap |
| Tension Supported | 8-lbs or 15-lbs |
| UPC | 891922002216 |
| Warranty Description | NO |

## Product Details

- **Brand:** Fender
- **Color:** Red
- **Item Weight:** 3 ounces
- **Material:** Plastic
- **Style:** Wrap

## Images

![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) - Image 1](https://m.media-amazon.com/images/I/71QkdlSbeyL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Frequently Bought Together

- FENDER Callus Builder and Finger Strengthener (Red 8-lbs) – For people who play any stringed instrument (Guitar, Bass, Violin, etc.)
- Fender GRIP Hand and Finger Exerciser (Medium - 5lbs / 2.3kg) – Best Ergonomic Finger Strengthener to improve play on all stringed instruments (Guitar, Bass, Violin, etc.)
- Fender GRIP Hand and Finger Exerciser (Hard - 7lbs / 3.2kg) – Best Ergonomic Finger Strengthener to improve play on all stringed instruments (Guitar, Bass, Violin, etc.)

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**Shop now:** [https://www.desertcart.tn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser](https://www.desertcart.tn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-29*