--- 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: "1373841₫" currency: VND in_stock: true reviews_count: 13 category: "Fender" url: https://www.desertcart.vn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser store_origin: VN region: Vietnam --- # Ergonomic, realistic finger positioning Iconic Stratocaster shape 8 or 15 lbs resistance levels 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:** 1373841₫ **Availability:** ✅ In Stock ## Summary > 🎸 Strengthen your grip, own the stage. ## 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?** 1373841₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/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 - • **Official Fender Design:** Stand out with a licensed Stratocaster-shaped trainer that doubles as a stylish accessory on your practice desk. - • **Ergonomic Play Simulation:** Designed to mirror your hand’s natural playing position, ensuring targeted muscle and callus development. - • **Tailored Resistance Options:** Choose RED (8-lbs) for steady progress or BLACK (15-lbs) for intense grip training—perfect for every skill level. - • **Portable Practice Powerhouse:** Lightweight and compact, take your finger workouts anywhere to maintain peak performance on the go. - • **Pro-Level Finger Conditioning:** Build calluses and finger strength with patented raised ridges that mimic real guitar strings. ## Overview The Fender Patented Callus Builder & Finger Strengthener is a uniquely designed finger exerciser shaped like the iconic Stratocaster guitar. Available in 8-lb (red) and 15-lb (black) resistance levels, it features raised ridges that simulate real string tension to build calluses and finger strength. Ergonomically crafted to replicate natural playing angles, this tool is ideal for guitar, bass, and violin players seeking to improve endurance, coordination, and grip strength anytime, anywhere. ## Description Product description Review: Great Tool for Fingers - I use these to keep calluses on finger tips especially when I’m at work. Thereby maintaining calluses so I can play guitar easier. I also notice more strength in fingers. Review: FENDER Patented Callus Builder & Finger Strengthener - work good ## 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 | #1,255 in Musical Instruments ( See Top 100 in Musical Instruments ) #13 in Guitar Tools | | Brand | Fender | | Brand Name | Fender | | Color | Red | | Customer Reviews | 4.6 out of 5 stars 364 Reviews | | 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 Level | 8-lbs or 15-lbs | | 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) ![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 2](https://m.media-amazon.com/images/I/71h5-fjNu4L.jpg) ![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 3](https://m.media-amazon.com/images/I/71ZvPVhUhkL.jpg) ![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 4](https://m.media-amazon.com/images/I/61KCI9OsgnL.jpg) ![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 5](https://m.media-amazon.com/images/I/71zIfEEAjeL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Tool for Fingers *by B***N on May 17, 2026* I use these to keep calluses on finger tips especially when I’m at work. Thereby maintaining calluses so I can play guitar easier. I also notice more strength in fingers. ### ⭐⭐⭐⭐⭐ FENDER Patented Callus Builder & Finger Strengthener *by T***Y on April 30, 2026* work good ### ⭐⭐⭐⭐⭐ Would recommend *by J***J on February 21, 2026* Works great. I never seen anything like this. I've been using it to strengthen my fingers but the callus strips work awesome. I've been able to practice longer without my fingers hurting from the strings. The price I thought was a little high but now I think its worth it. I like the color but that wasn't important to me. I would recommend this. ## 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.vn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser](https://www.desertcart.vn/products/558796507-fender-patented-callus-builder-and-finger-strengthener-resistance-finger-exerciser) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-06-03*