PORTER-CABLE 77240 24-Inch Omnijig Joinery System Adjustable finger template enables user to cut variable-spaced half-blind and through dovetails Fixed-space template enables half-blind dovetails to be cut with a single pass of the router Adjustable, split finger design allows user to change both position and width of pins for chosen joint style Pre-assembled and factory set to minimize user set-up time; Durable base design allows for clamping or bolting directly onto work bench