T-H CMC Transom Wedges/Set Back Spacers, 20122: * Used as an aid for boats with an insufficient transom angle or for boat having planning problems at low speed * Unique design of the CMC transom wedges also allows you to use them as setback spacers, by simply inverting 2, 4 and 6 sets * Hole designs fits the same pattern as the jack plate transom bracket and standard motoring mounting * Easy to install * Designed to give extra positive or negative trim