The Woody's Trigger Lake Race stud is a long, thin, and tapered profile stud designed for maximum penetration on hard lake ice. These are 5/16" shank and a small head designed for 2-ply tracks. They have 60 degree point and carbide tip and include Woody's medium height aluminum nylock locknuts. You must verify that your tunnel protectors are tall enough to run these studs. These are essentially the same as the INS 1.62" Stinger studs. Sold in packages of 48.