Makita D-40185 spiral step drill bit

Step drill bit coated with a durable and extremely hard TiN coating for drilling burr-free holes from 4–20 mm or enlarging holes in metal. Overall length 75 mm, working length 53 mm, and 1/4" shank.

Diameter: 4–20 mm
Overall length: 75 mm
Working length: 53 mm
Hex shank: 1/4"
pcs / pkg: 1