For a super-smooth cut finish, Use a four-flute bit. Feed rate is reduced, and chipping is virtually eliminated, #57187, diameter (D): 3/4, cutting Height (B): 2, shank (D): 1/2, overall length (L): 4-3/4, replacement collar: 47740, replacement bearing: (Upper (2)) 47721 (lower) 47714, flutes: 4, 57187 carbide Tipped multi-trimmer 3/4 dia x 2 inch x 1/2 shank x 4-flute