This is the Koah Soft 2PK Triangle Spear Shaft Tip Protector Features: Triangle design keeps it stable and prevents shafts from rolling around the deck of a moving boat Soft silicone prevents any sliding and allows the protector to fit all shafts from 9/32 (7mm) , 5/16 (8mm) and , 11/32 (8.5mm) and 3/8 (9mm). Nothing like the pain of accidentally kicking an exposed spear tip on the deck of a boat. New and improved, these soft tips will protect yourself, your crew and your boat/vehicle from potential damage from a sharp spear tip or gaff. Triangle design keeps it stable and prevents shafts from rolling around the deck of a moving boat. Soft silicone prevents any sliding and allows the protector to fit all shafts from 9/32 (7mm) , 5/16 (8mm) and , 11/32 (8.5mm) and 3/8 (9mm).