A-B17041855YP-AI DRIVEN DISCOne New Aftermarket Replacement Driven Disc for Snapper, Murray, Simplicity and Fits Craftsman Walk Behind Mowers This driven disc is a key component of the self propelled drive system on Snapper and compatible walk behind mowers. Composed of a metal and rubber composite, the disc mounts onto the hex shaft that drives the wheel, enabling variable ground speed and smooth forward propulsion. It is sold individually. Weight: approximately 0. 38 lbs.