The Z-Lock Jack Plate has a revolutionary new design that adds strength and stability while eliminating side slippage. The unique configuration has matching slotted extrusions that lock the side plates in place. Constructed of a full 1/2" thick strong aircraft aluminum, the Z-Lock Jack Plate from T-H Marine is a perfect match for the toughest outboards and conditions. The one-wrench design allows you to easily adjust the jack up or down from the transom of the boat without removal from the water. Mirror polished for a great looking finish.• 6" setback• 5" vertical rise• Handles all V6 outboards up to 300 hp• Overall: 15-1/2"H x 16-3/8"W x 6"D Full 1/2" thick aircraft-grade aluminum 5" vertical rise Handles all V6 outboards up to 300 hp | Z-Lock Jack Plate w/ 6" Setback