Woodys Grand Master Pro Stud for Single-Ply Tracks - 1.575in. GMPP-1575-48 The Grand Master Pro snowmobile stud with a 60deg. carbide tip in a steel shank makes an aggressive profile to easily penetrate hard pack and ice. Grand Master Pro has 60deg. carbide insert. A 1.200in. head makes a larger anchor to distribute pressure over a wider area on the single ply track. This is the same stud as BRPs Phantom Sharp Stud. This stud cannot be used in a traditional 2 ply track.