Screw-in Studs Grizzly Snow Stud® Screw Studs and Screw-in Studding Equipment. Screw-in studs for ATV, Farm, Tractor and Mining equipment. 13 MM Screw Stud SS-13 15 MM Screw Stud SS-15 18 MM Screw Stud SS-18 25 MM Screw Stud SS-25 30 MM Screw Stud SS-30 35 MM Screw Stud SS-35 Screw Stud Tool #11-13 Socket Screw Stud Tool #15-18-25 Socket Screw Stud Tool #30 Socket Screw Stud Tool Adapter