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. Contact your boat manufacturer or local dealer for setback recommendation for your particular boat and also the affects adding a jack plate can have on your boat” 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 outboards Easy to Adjust From Top of Jack Available in 4", 6", 8", 10" and 12" setbacks 5" of Vertical Adjustment OEM/Bulk Product Name Distributor Packaged JPZ-4-DP Z-Lock™ Jack Plate - 4" Setback JPZ-4-DP JPZ-6-DP Z-Lock™ Jack Plate - 6" Setback JPZ-6-DP JPZ-8-DP Z-Lock™ Jack Plate - 8" Setback JPZ-8-DP JPZ-10-DP Z-Lock™ Jack Plate - 10" Setback JPZ-10-DP JPZ-12-DP Z-Lock™ Jack Plate - 12" Setback JPZ-12-DP