Our one-peice design eliminates clogging and provides a much smoother and faster drilling stroke that the drill bits with replaceable center drills. The KJD bit for our manual Pocket Hole jigs is made of high-speed steel while the DKDB machined bit is made of cobalt steel that increases the bit's life. Because the DKDB bit is also 3/8" diameter it can be used in any of our other manual jigs as a premium replacement. Be sure to order the left hand drill bit (LH-DKDB) for the center spindle of the DK3100 fully-automatic machine.
