uxcell 2pcs M20 Lifting Crane Swivel Hook Double Pulley Block Hanging Wire Towing Wheel 304 Stainless Steel: Home Improvement. Buy uxcell 2pcs M20 Lifting Crane Swivel Hook Double Pulley Block Hanging Wire Towing Wheel 304 Stainless Steel: Snatch Blocks - ✓ FREE DELIVERY possible on eligible purchases. Package Content: 1pcs x Crane Pulley Block; Main Material: 304 Stainless Steel; Weight: 175g; . Sheave Size: 20x12mm/0.79x0.47 inch(D*T) ; Sheave to Bottom Length:6mm/0.24inch; . Overall Size: 71x25x31mm / 2.8"x0.98"x1.22"(L*W*H); . Sheave U width:7mm/0.28inch ; Accept Max Weight: 75kg . 360 degrees rotation to prevent rope from knotting for convenient use. . Features:.Package Content: pcs x Crane Pulley Block; .Main Material: 304 Stainless Steel;.Weight: 75g;.Sheave Size: 0xmm/0.79x0.47 inch(D*T) ;.Sheave to Bottom Length:6mm/0.4inch;.Overall Size: 7x5x3mm / ."x0.9"x."(L*W*H);.Sheave U width:7mm/0.inch ;.Accept Max Weight: 75kg. . .Description:. .A Crane Pulley Block is a kind of hoisting tool, also called a sheave, is a mechanism composed of a wheel on an axle or shaft that may have a groove between two flanges around its circumference. A rope, cable, belt, or chain usually runs over the wheel and inside the groove, if present. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion..Designed for use with rope or cord in indoor and outdoor applications, but only pulley here, rope is not included.. . . . .