2 flute, micrograin carbide-tipped. To join materials at 90 degrees by cutting a 45 degree miter and a perfect matching tongue and groove glue joint. This extremely strong joint not only increases mechanical strength, but also increases glue surface area and automatically aligns parts. Make frames, boxes, right angle and parallel angle joints. Joins stock from 5/8" to 1-1/16" thick. 2-3/4" Large Diameter. 1-3/16" Cut Height. 1/2" Shank.