The R7 roto action works similar to the Trick strainer, where the throw off level rotates radially from the shell instead of up and down or off to the side. A unique feature is 2 multi-steps, so the strainer can be on, 1/3 off, 2/3 off and off. Features all of the same patented features that the R4 has including a quick release strap/cord clamp. Overall height is 3 1/2". Includes a gasket and mounting screws for shells up to 1/2" thick. A slot on the back of it allows multiple mounting screw distances from 5/8" to 1 1/4". A butt plate is not included.