This plate goes behind/inside the transom and is what your motor mount bolts will attach to. This is a much simpler and more efficient way of mounting your engine instead of using individual nuts and washers. The holes are tapped for 6-32 bolts (included). This plate distributes the clamping force across a much larger area so you don’t deform the transom area while tightening the motor mount. It also eliminates the need to have wrench/pliers access in the transom when making adjustments to the engine mount. This bolt pattern is ONLY for the typical K&B pattern. Many motor mounts use this pattern, please verify your mount pattern before purchasing. The hole spacing is 1.5” wide and .75” high. Made in the USA from billet 6061 aluminum. Final product may vary slightly from the pictures due to constant fine tuning of the material and design.