Strong, reliable, and available in a range of sizes and styles, Ronstan snatch blocks are standard equipment on most sailboats. Features include 15-5 PH stainless shackle and attachment bolt for strength, soft PVC cheeks that prevent damage to decks and eliminate clatter, cast 300 series stainless steel hasp and hardware, stainless roller bearings for smooth operation. Removable aluminum sheaves, midrange, feature Acetal sheaves, and big boat sheaves are removable stainless steel. Black. Sheave: Acetal plastic Cheek Material/Finish: Soft PVC Bearings: Stainless needle bearings Opening: Friction hasp