Woodys Grand Master Studding Kit for Single Ply Tracks GMPK-1325-90A full 90 piece studding kit ideal for many new sled configurations Kit includes 90 Grand Master 1. 325in. Studs, 90 Grand Digger Round Aluminum Support Plates and 90 Short Big Nuts Grand Master studs are designed for single ply tracks with a 1. 200in. head, 5 16in. shank and 60deg. carbide tip A 1. 200in. head makes a larger anchor to distribute pressure over a wider area on the single ply track These studs cannot be used in a traditional 2 ply track