First piece is cut flat (horizontal) and the second is cut perpendicular (vertical) to the first for a perfect fit. There is no need to re-align the router depth, provided that the wood is centered to the cutting edge of the bit. Not recommended for use in a pin router nor a router table unless the length of your material can be handled easily. Can be used on 1/2 through 7/8 material 18,000 max. RPM 1/2 shank. Two flute. Diameter 2-11/16, flute length 1-3/16, 45 degree corner Overall length 2-5/8