I don't have any Turbo grips, but found this nice link on descriptions: https://turbogrips.com/products/inserts/
They have several different types and it seems that some with the nubs might be good for me.
The PSO here has Vise grips and he carries the ones with Oval and Power Lifts. I've found the ovals to be good. I've ordered the O-PO (oval - power oval) type and like the power oval for my ring finger.
The two types of grips I have are marked 13/16 and size 8 plus 49/64 and size 6 1/2.
Vise offers their catalog on their website and I didn't see any size 13; however, there is a 13/16th's like I use. Size 3 is listed as 21/32nd's and there is a size 6 at 3/4.
Hope this helps...
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