HARDBITE WADING BOOT STUDS: The Simms HardBite Wading Boot Studs are designed for Vibram sole boots. Use these studs to easily convert Simms StreamTread wading boots to studded boots for a better grip and balance. CORROSION RESISTANT: These 45+ Rockwell hard screws are zinc-plated. The zinc will help resist corrosion and rust, extending the lift of your new studded boots. ENHANCE TRACTION: Place the welded carbide gripper studs on your Vibram-soled wading boots to gain additional traction and durability while navigating icy or slippery terrain. EASY INSTALLATION: These studs feature a 0.25 in. hex head. Simply install them into the bottom of your wading boots for instant studded boots. SIMMS FISHING: Show off your Simms Fishing pride with these premium Wading Boot Studs. These are for use with Vibram-soled boots only.