This is a ProTek R/C Flywheel Nut, Collet and Shim Set, and is intended for use with 1/8 Scale Nitro Engines. Having the proper shims for the job is important. You don't want too much play or too little. This ProTek R/C Flywheel Nut, Collet and Shim Set is sure to have what you need to get it just right.

Includes:

• (1) Flywheel Nut
• (2) Flywheel Nut Shim
• (1) Crankshaft Screw
• (1) Collet
• (1) Collet Shim
• (1) Collet Insert
• (6) 0.1mm Shim
• (6) 0.2mm Shim