Wayco Scissor Jack 1.0 Ton Impact Driver Metric & AF Socket Set Outdoor Power Equipment Metric & AF Socket Set 44 piece 1 2 Drive Socket Set containing 12 point regular metric & imperial sockets deep metric sockets FRP ratchet flex handle extension bars universal joint T bar adaptor and spark plug sockets screwdrivers and a double ring spanner Tested and Certified to the AS NZ 4601 amendment 1 2003 and AS NZS3749 They are called scissor jacks because they are made of diagonal pieces of metal that contract and expand in a way similar to that o f a pair of scissors Scissor jacks are devices that are used to slowly and carefully lift vehicle s off of the ground