Bob's Machine Transom to Jack Plate Bolt KitThe Bob's Machine Transom to Jack Plate Bolt Kit is used for jack plate installation. This kit is for motors with a standard BIA bolt pattern only, and cannot be used with the Bob's Machine Mini Manual Jack Plate. This kit is available with different length bolts.Bolt Sizes Available: 4"; 5"; 6"; Kit Contains: (4) 1/2" SS Bolts; (4) 1/2" Nylok Nuts; (8) Flat washers; (4) Lock washers;