Orvis PosiGrip Screw-In Wading Studs - 24 Pack - PosiGrip Screw-In Studs add traction to the soles of your favorite wading boots in moments. Aggressive tungsten carbide-tipped PosiGrip Screw-In Studs that can be added to any wading boot with at least 1/2in of midsole depth. Sharp tip allows for quick and easy installation into felt or rubber outsoles. A must where maximum traction is needed. 1/4in hex head screws. Adapter for power drill included. Screw-in studs with exclusive tungsten-carbide tips 24 studs per package Adapter for power drill included Style: 9T1G1000