X Marks the Bite Durable, carbide screw-in cleats for added traction on slimy, mossy rock. TRACTION // Incredibly durable, sharp tungsten-carbide screw-in cleats bite through slick algae and moss-covered rocks and provide enhanced traction INSTALLATION // The sharp tip and unique auger thread design keeps cleats locked into place and makes installation easy. QUANTITY // 24 Pack WARRANTY // Standard Warranty: 1 year from the date of purchase.