The bit bodies have a non-stick coating for easy resin removal. Which bit would work better with 3/4 stock the sr. or jr. For the best experience on our site, be sure to turn on Javascript in your browser. the joints would not close up to make a nice clean square block. To use the jig, clamp the workpiece between the two rails, and then feed the assembly past the bit, as shown in Photo D. You must be logged in to write a comment. Makes a perfect matching, strong tongue and groove joint. . I use this bit with a router table to make edge joints for small boxes and frames. The Lock Miter Sr. router bit (55-503) cuts perfect 45 joints in stock from 5/8" to 1-3/ . You can also use the lock miter to glue up matching board stock horizontally. A shipping surcharge applies in addition to our regular shipping and handling fee. You can also use the lock miter to glue up matching board stock . You may also return purchases to a Rockler store near you for store credit. Lock miter router bits 8/955.503-504 These are the ultimate bits to craft sturdy miter joints thanks to anti-kickback design and tough tungsten carbide cutting edges. The clamped-on track allows the use of a commercial featherboard. Carbide Lock Miter Router Bit features Tri-Metal Brazing for strength and impact resistance. The interlocking 45 cuts will produce extremely strong joints . Detach the test pieces from the rails and try fitting them together. However, I find that setting the fence now eliminates the hassle of a second round of test cuts. Rock solid joinery, square, tight fit. - Perfect for cabinet framing, drawers, four sided planters, boxes, shadowboxes, columns, hollow beams, fine furniture framing and much, much more. The small tongue that is made on the vertical cut is only attached by the glue between the plys. It is featured as part of our commitment to diversity and inclusion. Sinoprotools Lock Miter 45 Degree Joint Router Bits [1/2-Inch Shank], Wood Milling Cutter Woodworking DIY Tool.