Gold digger carbide: The original push through stud and still the best. Easily installed, the Traction Master Studs grip the track with holding power that resists “laying over and provides maximum traction. Packaged complete with nyloc nuts. Backing plates must be ordered separately. 60 Degree tip is ISR legal. Nuts included, plates are NOT included. 1.325 studs now come with BIG NUTS for added support. Silver-Mega-Bite: The patented Mega-Bite is zinc coated. Woody s quality and Traction Master design. Easy installation. Designed for excellent performance on the Snocross track with new taller track lug heights. BIG NUTS included, plates are NOT included. Race Stud: ISR legal for 1-3/4 tall tracks. BIG NUTS included, plates are NOT included. Chisel Tooth: The Chisel Tooth stud penetrates like a dagger and scoops like an excavator. The longer Chisel Tooth is designed for hill climb, drag and lake racers. The 1.630 has an overall installed height 1.88 and 2.11 on the 1.860 studs. Trigger: Woody s new Trigger stud is the necessary stud for lake racers. The Trigger has a long and narrow profile providing you with unmatchable penetration. These all new studs are durable enough for any lake conditions you find. The overall installed heights for the 1.450 is 1.70 and 1.88 for the 1.630 studs. Eliminator: This stud with a Traction Master® head has a 30° point and narrow profile to penetrate the hardest ice. A perfect design for speed runs, drag racing and high-speed ice applications. Use the 18-1089 series support plates.