ROUTER BITFinally, a slot cutter without shims, spacers and the need to disassemble the bit. Just turn the dial and lock the setting, it's that easy. The E-Z Dial™ adjusts in just seconds and is accurate to .004." Cutting precise grooves in today's undersized plywood has never been easier. Quick & Easy Setup – Nothing to take apart, just dial it, lock it, cut it. Simply adjust the dial in 0.004" increments. Easily makes perfect grooves for today's undersized plywood. Perfect for edge (“T”) molding installation.