Simms Hardbite Boot Studs Felt. HardBite Wading Boot Studs - For Felt Soles (20 Count) easily convert felt wading boots to studded. 45+ Rockwell hard screw, zinc-plated for corrosion resistance 0.25 in. hex head sharp point screw fits any 0.25 in. nut driver or drill bit Welded carbide gripper pellets enhance traction & durability For use with felt soles Simms Hardbite Boot Studs Felt (20 Pack)