Valterra Stackers Leveler/Jack Pads function as a multi-use leveler, jack stand and tongue wheel support. The attached easy grip handle acts as a transition to the next step for a smooth ramp. Stackers can hold up to 40,000 lbs. gross vehicle weight on a firm level ground or 10,000 lbs. per wheel. Each set contains a convenient self-fastening strap for storage. Dimensions: 8 x 10 x 1-1/2.