In-Store Service Only — Choose Your Location at Checkout What This Service Is: The Custom Thumb Mold system creates a true copy of your exact thumb shape by pouring a silicone mold into your existing thumb hole. Once the mold sets, we use it to create a solid, non-interchangeable custom thumb insert using quick plug materials. This insert is a cast of your natural thumb shape — not just the size, but the contour, taper, pad pressure points, and overall geometry of your preferred feel. This service is ideal for bowlers who: Can’t use interchangeable thumb systems Have had issues with switch grips or IT-style systems Want increased comfort, security, and a consistent feel Prefer a thumb shape that is smoother, more natural, and molded to them How It Works: Step 1 — Create Your Silicone Thumb Mold We pour silicone into your current thumb hole to capture your shape. This creates your master mold. Turnaround: 1 day Cost: $15 Step 2 — Create Custom Thumb Inserts From Your Mold We use your silicone mold to cast individual thumb inserts for additional bowling balls. Each insert is manually poured, shaped, and finished. Cost: $20 per extra insert Turnaround: 1 day per insert Important Details to Know: While Exactacator inserts are highly durable — with no moving parts to crack or wear out — they do have some natural limitations: Because inserts are manually cast, small variations in pitch may occur from ball to ball. The silicone mold must be perfectly centered inside the cylinder; otherwise, pitch can be slightly off. Inserts can occasionally come loose from the ball as the insert material continues to cure, harden and shrink. This system does not interchange between balls; each one must be permanently installed. These can be added to an interchangeable system, if you have one thumb hole that has never been successfully duplicated, you can create a mold and put it into an interchangeable system. For most bowlers who want a molded, organic thumb feel but dislike interchangeables, this system is a great alternative. Turnaround Time: 1 day for the initial silicone mold 1 day per additional insert Important Notes: This is an in-store service only. Be sure to choose the correct location at checkout for where you will drop off and pick up your equipment. Additional grip adjustments (tape, bevel, surface tuning) can be added upon request. Perfect For: Bowlers who want a smooth, natural thumb feel Those who struggle with swelling, shrinking, or inconsistent release Anyone who prefers a custom thumb without mechanical parts Customers wanting a permanent, molded thumb feel in every ball they own
