Hot Racing Traxxas Sledge Stainless Steel Motor Locking Washers. Designed to keep your Traxxas Sledge's gear mesh locked in place these oval locking washers from Hot Racing keep your motor from moving in extreme conditions. Simply insert the washers into the bottom of the chassis and lock them down with the provided hardware. These washers are intended to work with a 1.0 Mod 13T pinion and 52T spur gear. Package includes four 16 Gauge stainless steel oval washers and four 4x16mm 12.9 class cap head screws.