JPZ-8-DPZ-Lock™ 8 Set Back Manual Single Adjust Jack Plate Z-Lock Jack Plate Revolutionary Design Adds Strength and Stability. The excellence of T-H Marine's HI-JACKER™ jack plate series continues with the Z-Lock Manual Jack Plate design upgrade. Features: Z-Lock™ Jack Plate Design Eliminates Side Slippage Matching slotted extrusions LOCK side plates in place Strong Aircraft Grade Aluminum Full ½” Material For Strength Handles All V6 and V8 Outboards up to 300 hp Easy to Adjust From Top of Jack Availabl