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Your cart is empty.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.
Dr. John L. Takeuchi Turner
Reviewed in the United States on February 21, 2025
Preparing to play again, this nifty device helps me to harden up my fingertips again! This 15-pound unit requires a bit of strength, and it prompted me to order and begin with the 8-pound FENDER callus builder first! No problems with the unit so far, and I now use both daily. My fingers are stronger, callus formation happening, and the price was great with fast shipping! The magnet is great to store them on my metal cabinet door. Highly recommended for new guitar players or returning back to strings!!
Anthony F. Moorman
Reviewed in the United States on January 22, 2025
So far so good. When not practicing and watching TV it’s a fun passive thing to do to build strength and callous build up. But I also need to remember to practice practice practice. Just by practicing muscles and callous will happen naturally. But maybe this little gadget is a small hack to build finger strength early and get through finger tip pain quicker. 🤘
Eric
Reviewed in the United States on August 27, 2024
Very very cheap.The magnet is so darn cheap that it cant even hold the weight of the object when it is by itself, let alone when you try to clip it to something. Also, because it is so heavy and so cheaply made (using double sided foam tape to hold the magnet on) it will eventually fail by itself and fall. Which is how I go the above picture. Which now at least makes sense, because the so called "magnet" that they used was just a steel casing and not even the real magnet. The real one is the small disc stuck to the middle disc in the photo. So, they used cheap materials to hold it in place, and a cheaper smaller magnet within a larger casing so it looks bigger than it really is. And it was engineered in such a way that it just barely manages to hold its own weight.Let that sink in for a bit. They spent the time, money, and resources to engineer it this way. The absolute cheapest way possible. This was done purposefully. I would give zero stars if I could. What a piece of junk. I wish it would have failed sooner so I could have gotten my money back. 0/5 stars.
Always looking to mimic life more closely
Reviewed in the United States on August 14, 2024
Like most people starting out on guitar I find 15 or 20 minutes into playing I have to stop. My fingers hurt, and I lack strength and flexibility in my ring and pinky fingers in particular. I leave this in my car and I use it similarly to a stress ball. My callouses have and I find I can now practice for an hour or more. Better than that though, my playing is much better because I have the strength to properly press the strings. Now if I can figure out how to stretch out my fingers I’ll be doing great. This is a simple gator clip with 15 lbs of tension and a bumpy surface on one side, so simple but incredibly effective.
Jerry
Reviewed in the United States on February 12, 2024
So I bought this because my middle to pinky fingers are not building fast enough for me. I decided to order this because well its only $16.First day I had it I used it all day for hours. When the fingers and hand got really sore I put it down for a shot bit then started back again.Second day. My hand was in extreme pain. I kept trying to use it on and off all day again even using my other hand to help press down on this thing. Towards the end of the evening the three fingers I was hoping to build up was showing signs that it was working.Third day. Today the fingers really are starting to develop so I have no doubt that this thing will work. My fingers are quite sore but its bearable.Important note: People should be using this for the tips of there fingers not the pads. I am sure that the pads could also benefit especially if you have short fat fingers like mine.The more you use it the faster it will work.
Josh Urich
Reviewed in the United States on December 6, 2024
I’ve been needing something to keep my fingers strong and to maintain my callouses when I have long trips where I can’t bring my guitar. I use this all them and it’s awesome. Keeps my fingers strong and ready to play even if I can’t use my instrument. Great travel size.
phil
Reviewed in Canada on November 27, 2024
Builds calluses quickly. Would recommend
Stephen McSpirit
Reviewed in the United States on October 1, 2024
I haven't experience any issues like some other reviews have talked about with the unit breaking after some days of using it. I've been using this mostly daily for almost a month now and it works very well. Plastic and rubber(or maybe silicone?) parts look and feel thick and sturdy. Maybe it would cause an issue if you squeeze very hard and fast over and over, but that's not how you should use this product anyway. The goal isnt to squeeze as hard as you can. I press hard but not too hard to where it's painful, slowly do a few reps squeezing the clip about halfway, causing deep imprints on my finger tips. Then i move my fingers left, right, up, down while i hold down on a single line. Which essentially just tugs the skin on your finger tips in every direction, causing your skin to want to callus even more. Honestly i think pulling the skin causes callus more than just pressure on an area.Haven't tried the magnet but it seems firmly attached by a blot of glue. The magnet does move around a tad so if you used the magnet on a daily basis i can see maybe eventually it would fall off and you would have to re-glue it. Really not a big deal.I'm honestly not sure why this isn't more of a common tool you see around. Searching Amazon this one is really the only one that pops up. Definitely works though.
Scammed😒
Reviewed in the United States on April 21, 2024
Absolutely 10/10 would recommend... Well for those with a heavy or thicker hand I suppose. Not throwing myself under the bus, but this was rather difficult to compress as a novice.. on the other hand. No pun intended lol it helped build calluses wonderfully and in a couple days at the most. Would recommend to a friend.
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