The Peachtree Dovetail Jig (NOT included and sold separately) comes with a standard router bit set for working with stock from 5/8” in thickness to ¾” in thickness. In the event that you lose or damage one or both of the router bits that came with your Peachtree Dovetail Jig, these bits are the replacement. These two bits are used to cut standard size dovetails in stock up to ¾” in thickness. These bits are the most commonly used bits for building boxes, cabinets, furniture and a whole lot more. The set includes one each dovetail router bit and one each straight router bit. The dovetail bit is a 7 degree bit and the straight bit is 5/8” in diameter. Both bits are made with a 1/4" shank and have 5/8" bearings.