Finally, 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, #55510, diameter (D): 2-1/8, cutting Height (B): 1/4 - 1/2, shank (d): 1/2, overall length (L): 3-3/4, C: 1/2, Wings: 4, 55510 E-Z dial slot Cutter 4 Wing x 2-1/8 dia x 1/4-1/2 x 1/2 inch Shank