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″

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More info: Amana 55390 45 Degree Lock Miter Router Bit - 1/2″ Shank, Two Flute