3 Piece 3/4" Shank Fly Cutter Set (3/8-3/8-1/2" Capacity) ~ Utilizes standard tool bits. ~ Counter balanced. ~ Made of durable hardened steel. ~ Cuts flat and smooth surface with a single cut. ~ 1-1/2" head diameter piece with 3/4" shank takes a 3/8" tool bit. ~ 2" head diameter piece with 3/4" shank takes a 3/8" tool bit. ~ 2-1/2" head diameter piece with 3/4" shank takes a 1/2" tool bit.