"Introducing the Pilot Extreme Carbides, a game-changer in the world of tracks skis. Designed specifically for the passionate Ski-Doo enthusiast, these round 1/2"" carbides come in a convenient pack of 4, ensuring you have everything you need for peak performance on the snow. With patented technology (US 7,413,198, US 7,389,995, and CA2535565), you can trust that these carbides deliver unmatched durability and precision. Whether you're carving through fresh powder or tackling challenging trails, the Pilot Extreme Carbides elevate your ride, giving you that fearless edge to conquer any winter adventure. Round 1/2"" - Pack of 4 *Protected under patent numbers US 7,413,198, US 7,389,995 and CA2535565."