This twelve-piece adapter set increases the service capability of the QuickJack series by providing stackable adapters that mount inside the main rubber lifting block trays. Better accommodates higher ground-clearance vehicles or those with unique jacking point locations. Complete kit includes: (4) Low-profile round polyurethane contact pads (4) Sliding receivers that accommodate the round polyurethane contact pads and/or the stackable adapters (4) 3" stackable adapters