Made of 316 Stainless steel with 304 Stainless Pin. Pulls anchor tight and keeps it snug against its roller,Cam action creates up to 200 lb. tension with minimal effort. Use with windlass, anchor rollers and anchor mounts,For anchors to 90 lb. Dimension:1-3/4"W x 8-1/4"L Package contents: 1 pcs MARINE CITY 316 Stainless steel Anchor Chain Tensioner (Not Included two #12 FHMS fasteners ).