This Engine Sling has Dual Mounting Chains and brackets allow for quick attachment to an engine. 600 lbs Rated. Chain Plate Groove allows for Weight Balance Adjustment. Engine Mounting Plates Have the Following Dimensions: 2-5/8" x 3-1/4" (Width x Height) Engine Mounting Bracket Holes are 1/2" Diameter. Top Hoist Plate Overall Dimensions: 2" x 5" (Width x Height).