This high-quality scraper is essential for adjusting bowling thumbholes. When you feel that your thumbhole has become a little tight, this tool allows you to smoothly shave from the bottom to the top of the finger hole. Fine adjustments are possible: You can shave off small amounts at a time, allowing for subtle adjustments to fit your finger, or even shaping the hole into an oval to match the shape of your finger. Also useful for other purposes: It's also helpful for cleanly removing super glue residue stuck inside the hole when removing finger grips. Replacement blades included: The main body is equipped with a 5/8 inch (approx. 16mm) blade, and a larger 3/4 inch (approx. 19mm) replacement blade is also included. Durability: Made of high-quality aluminum and with replacement blades, it can be used for a long time. Unlike a triangular knife, it is characterized by its ability to evenly shave the entire hole. This is a no-brand product. 【Keywords】 #bowling #thumbadjustment #scraper #thumbhole #ebonite #KR #fingerholeadjustment #shaving #ultrafit #ballworkingtool