---
product_id: 558796507
title: "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: "31392CFA"
currency: XOF
in_stock: true
category: "Fender"
url: https://www.desertcart.sn/products/558796507-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser-guitar
store_origin: SN
region: Senegal
---

# Iconic Stratocaster shape Up to 15-lb resistance Raised string-like ridges 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:** 31392CFA
**Availability:** ✅ In Stock

## Summary

> 🎯 Level up your grip game with Fender’s patented power play!

## Quick Answers

- **What is this?** 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?** 31392CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/558796507-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser-guitar)

## 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:** Officially licensed Stratocaster-shaped tool that stands out in your gear collection and inspires serious play.
- • **Ergonomic Play Position:** Mirrors your natural hand and finger angles for targeted strengthening exactly where you need it.
- • **Realistic Callus Builder:** Unique raised ridges mimic string tension to develop genuine calluses where it counts.
- • **Pro-Level Finger Strength:** Build endurance and coordination with up to 15 lbs of resistance—perfect for daily practice or pre-show warm-ups.
- • **The Ultimate Gift for Musicians:** Compact, stylish, and fun—ideal for gifting to any guitarist or bassist ready to level up their skills.

## Overview

The Fender Patented Callus Builder & Finger Strengthener is a premium resistance exerciser designed specifically for guitar, bass, and violin players. Featuring an iconic Stratocaster shape, raised string-like ridges, and up to 15 lbs of resistance, it builds finger strength, coordination, and calluses in an ergonomic, realistic playing position. Perfect for musicians of all levels, it’s a must-have accessory for daily training and warm-ups.

## Description

desertcart.com: FENDER Patented Callus Builder & Finger Strengthener – 8-lb Resistance Finger Exerciser for Guitar, Bass & Violin – Guitar Finger Trainer & Grip Strength Tool – Ideal Guitar & Bass Accessories : 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 | #1,160 in Musical Instruments ( See Top 100 in Musical Instruments ) #13 in Guitar Tools |
| Brand Name | Fender |
| Color | Red |
| Customer Reviews | 4.5 4.5 out of 5 stars (400) |
| Item Shape | Variety |
| Item Type Name | Callus Builder |
| Item Weight | 3 Ounces |
| Manufacturer | Barrett Productions, LLC |
| Material | Plastic |
| Model Number | 891922002216 |
| 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

![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.)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

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

---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-14*