Pachmayer 752B small fits the Rokstok. comes in .6", .8" and 1" thick.
The 752B of all sizes have a metal frame according to each size so you can only grind about 3/16" in from any side.

The Pachmayer 500B and decelerator youth/xs fit the Lite.
The 500B is .5" thick, no frame.
The Decelerator youth is 1" thick and has washers around the screw holes, no frame.

Btw- Brownell's is out of the 500B/youth...
The 752B of all sizes have a metal frame according to each size so you can only grind about 3/16" in from any side.

The Pachmayer 500B and decelerator youth/xs fit the Lite.
The 500B is .5" thick, no frame.
The Decelerator youth is 1" thick and has washers around the screw holes, no frame.

Btw- Brownell's is out of the 500B/youth...