If you've Often wanted to trim and shape small details in tight corners, we've got what you've been looking for: eight of the most commonly used profiles In miniature sizes. These bits are perfect for small fine work such as signs, lettering, small boxes, guitarmaking/luthier and toymaking; essentially any project that requires tiny flush trimming or shaping. Don't let the small size fool you; these bits are precisely machined and carbide-tipped., #MRB0604, diameter (D): 1/4, radius (r): 1/8, cutting height (B): 7/32, shank (D): 1/4, overall length (L): 1-1/2, MRB0604 carbide Tipped miniature core box 1/8 radius x 1/4 dia x 7/32 x 1/4 inch shank