Simms Hardbite(TM) Vibram Studs -Simms' HardBite Boot Studs easily convert their StreamTread(TM) soles to studded. 45+ Rockwell hard screw, zinc-plated for corrosion resistance 1/4 inch hex head sharp point screw and Hex Nut Driver Welded carbide gripper pellets enhance traction and durability 20 studs per package May be used individually or in combination with HardBite(TM) Star Cleats in any pattern Disclaimer: Screws must be screwed in manually Style: AU-HBV1