Description: Fit for 8-12mm rope 25KN breaking strength Aviation aluminum, high toughness and strength With convenient cam process capture, great helps slide up a rope easily but clamp when pulled in the opposite direction Great for climbing, rescue, mountaineering and improve both work efficiency and maneuverability Overall Size: approx. 190 x 73mm/ 7.48 x 2.87 inch (L x W) Materials: aviation aluminum Color: black Package Includes: 1 Piece 12KN Hauling Pulley