CMT Lock Miter Router BitsThese are the ultimate bits to craft sturdy miter joints thanks to anti kickback design and tough tungsten carbide cutting edges. By adding a second smaller bit, you can mill anywhere from 9,5mm to 28,5mm in thickness. A quick and easy way to accurately create boxes, stretcher bars, frames and any assortment of right angle or parallel joint projects. You also have the advantage of using the same bit for parallel joinery projects. To mill sturdy