Two flute carbide router bit cutters and 1/2" shanks. You certainly can cut lock miters by adjusting the fence and making multiple passes. I was very happy with the outcome. Create extremely strong,attractive miter jointsthat lock in place and won't open up. TIP: The secret to success with this bit is to make sure the center line of your work-piece is aligned to the midpoint of the lock miter pro-file. Using the examples shown below, adjust the bit height, recalibrate your fence, and make another test cut. Each includes an advanced polymer friction-fit holder that can be mounted horizontally or upright. The bit bodies have a non-stick coating for easy resin removal. Lock Miter 45 Degree Joint Router Bits + 2Pcs Tongue and Groove Set [1/4-Inch Shank], APLUS 45 Lock Mitre Glue Joint Router Bit + Router Bit Set 3 Teeth T Shape, Wood Milling Cutter Woodworking Tool. In this case, some detective work is in order. MNA 45 Degree Lock Miter Router Bit 3-Piece Set, for 1/2", 5/8", 3/4" Cutting Height, 1/4 Inch Shank.