Interchangeable Thumbs

Interchangeable Thumbs for Vise

 With Vise IT (Interchangeable Thumb) feel the thumb hole is always the same, since the use is made in each new ball.
In contrast to the switch grip system, a thread is used in IT Vise.
With an almost complete rotation is the thread in the ball where the counterpart is, locked.
This makes the system of interchangeable thumb blocks even safer.

 The system consists of an inner sleeve and an outer sleeve. 

Switch Grip® Interchangeable Inserts consist of ONLY TWO components, an Outer Sleeve that is permanently glued into your thumb hole, and an Inner Sleeve, which can be removed and used amongst all of your equipment. The Outer Sleeve will receive any of the following removable Inner Sleeve components:

• Outers: Black, Orange, Yellow, Green, Blue, Red, Pink, Purple
• Inner Blank: Black, Orange, Yellow, Green, Blue, Red, Pink, Purple
• Inner 1 1/4 .” Urethane: Black/Blk, Blk/Pink, Blk/Green, Blk/Red, Blk/Blue, Blk/White, Blk/Purple, Blk/Yellow, Blk/Orange
• Color Inner 1 1/4.” Urethane: Red/Blk, Blue/Blk, Yellow/Blk, Green/Blk, Orange/Blk, Pink/Blk, Purple/Blk
• Inner 1 3/8” Urethane: Black/Black

There are two locking tabs at the bottom of each Inner Sleeve, one tab is slightly larger/wider than the other to ensure the Sleeve can only be inserted one way into Outer Sleeve.  This prevents the Sleeve from being put in backwards or upside down.

The locking tabs are designed to withstand up to 180# psi. While they are certainly built to perform, like most consumable and movable products, the Inner and Outer Sleeve locking mechanisms will wear over time. There are many variables that influence how the product will wear including grip pressure, # of games bowled, # of times insert is being removed/interchanged, proper use and storage, drilling etc.

 JoPo Grips, a company with a new interchangeable thumb insert. This insert uses patented technology, creating a durable bowling grip that will enhance your bowling experience.
Benefits of the Twist
The thread-like feature absorbs the load of the weight and the velocity of the bowling ball delivery; i.e. visualize pulling a nut straight off a bolt without unscrewing it.
The Twist cannot be removed from the bowling ball without the inner being rotated 360º