The Bob's Machine Bolt Kit for jack plate installation is designed for motors with a standard BIA bolt pattern only. It is NOT for use with the Mini Manual Jack Plate. Kit Contains: Four 3-1/2" x 1/2" Stainless Steel BoltsFour 2-1/2" x 1/2" Stainless Steel BoltsEight 1/2" Nylok Nuts with Flat Washers and Lock Washers NOT for use with Mini Manual Jack Plate Four 3-1/2"" x 1/2"" bolts, four 2-1/2"" x 1/2"" bolts, & eight nylok nuts with washers | Bob s Machine Bob's Machine Jack Plate Bolt Kit, Set of 8