Specification Brand : USWWAGOODS BulletPoint1 : 3 Sheave 4-1/2 Sheave 6 Sheave. BulletPoint2 : The snatch block is a pulley system with covered and protected yet removable sides. BulletPoint3 : It has either a hook or a shackle at it’s tip. BulletPoint4 : Snatch blocks or pulleys are used to change the direction of the pull to a different angle relative to a fixed point. BulletPoint5 : If you have any questions about this product, feel free to reach out to us. We’re happy to provide any information you need. ItemName : TM USWWAGOODS Replacement for/Fits Snatch Block with Hook WLL 4 Ton 4 1/4' Sheave 1/2 Inch Wire Rope Wrecker Rol... ItemTypeKeyword : snatch-blocks Manufacturer : Truck-ASTRA-T-1539 PartNumber : Truck-Parts-ASTRA-T-1539 ProductDescription : Replacement For/Fits 3 Sheave 4-1/2 Sheave 6 Sheave. The snatch block is a pulley system with covered and protected yet removable sides. It has either a hook or a shackle at it’s tip. Snatch blocks or pulleys are used to change the direction of the pull to a different angle relative to a fixed point. UnspscCode : 24101600