Wood spade drills: 10, 13, 16, 19, 22, 25 mm, set of 6.

Wood Spade Drill Bits: 10, 13, 16, 19, 22, 25 mm, Set of 6. The 54T515 by GRAPHITE is a set of 6 spade drill bits with a Hex shank, featuring diameters of 10, 13, 16, 19, 22, and 25 mm and a length of 152 mm. The recommended maximum speed for these drill bits is 1750 rpm. GRAPHITE drill bits are recommended for wood and plywood. They are ideal for home carpentry.