Product Description
Keep your pro shop stocked with a five-pack of the Turbo Switch Grip NX Inner Sleeve with 1 3/8" Urethane Slug — the removable half of Turbo's next-generation thumb insert system, pre-loaded with a 1 3/8" 100% urethane thumb solid ready to drill and fit. Each sleeve in this pack is engineered with oversized Dual-Winged Tabs and an all-new Dual Snap™ Locking System, creating greater surface contact with the matching Outer Sleeve for enhanced stability, a stronger connection, and an unmistakable locked-in feel shot after shot.
Because the 1 3/8" size is larger than the 1 1/4" option, each sleeve is built with a slightly different profile — roughly half urethane thumb solid and half locking mechanism — to accommodate the bigger slug while still delivering the same secure Dual Snap connection (Turbo Grips NX installation video). This 5-pack is a smart way to buy in bulk and save on a per-sleeve basis, keeping your bench stocked for a steady flow of fittings using this larger standard thumb solid size.
Note that the Switch Grip NX Inner Sleeve features larger, redesigned locking tabs than the Original Switch Grip® and is only compatible with the NX Outer Sleeve — it will not lock into the original Outer Sleeve.
Key Features:
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Five Inner Sleeves per pack, each pre-installed with a 1 3/8" 100% urethane thumb solid
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Larger-diameter profile built for bigger thumb sizes
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Ready to drill — no separate solid fitting required
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Oversized Dual-Winged Tabs for maximum surface contact and stability
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Dual Snap™ Locking System for a stronger, more secure, locked-in fit
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Compatible exclusively with the Switch Grip NX Outer Sleeve (not interchangeable with the Original Switch Grip Outer Sleeve)
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Ideal for pro shops fitting multiple bowlers with a larger standard thumb size
Turbo Switch Grip NX Inner Sleeve with 1 3/8" Slug 5 Pack Installed FAQ
What's included in this 5-pack?
This pack includes five Switch Grip NX Inner Sleeves, each pre-installed with a 1 3/8" 100% urethane thumb solid ready to be drilled to size.
How is the 1 3/8" pack different from the 1 1/4" pack?
Beyond the larger slug size, each 1 3/8" sleeve has a slightly different build — roughly half urethane thumb solid and half locking mechanism — to fit the bigger diameter while still delivering the full Dual Snap Locking System connection.
Why buy the 1 3/8" Inner Sleeve in a 5-pack instead of individually?
Buying in a 5-pack lowers your per-sleeve cost and keeps your pro shop stocked for multiple fittings without reordering after every job — ideal for shops that regularly fit bowlers with this larger slug size.
Is this Inner Sleeve compatible with the Original Switch Grip Outer Sleeve?
No. The NX Inner Sleeve has larger, redesigned locking tabs that only fit the Switch Grip NX Outer Sleeve, and is not cross-compatible with the original line.
Do I still need the Outer Sleeve separately?
Yes. Each Inner Sleeve in this pack requires a Switch Grip NX Outer Sleeve, sold separately and permanently installed in the thumb hole, to complete the assembly.
Should I drill and fit these myself?
Drilling the Outer Sleeve hole and finishing the pre-installed solid to final thumb size should be done by a qualified pro shop technician for the best fit and durability.
What colors is this Inner Sleeve available in?
The 1 3/8" Switch Grip NX Inner Sleeve is available in Black.
