The polyester slings are used to fasten the winch or snatch block to a tree, without damaging the bark or cambium of anchor trees. These slings will not stretch and are useful for lifting or used as a choker. The Safe Working Load is 2090 kg (6400 lb) when used basket style (eg when anchoring the winch)or 2182 kg (4800 lb) in choker style (eg when anchoring a corner block).