Self-feed threaded tip with Lewis style of flute for speeding drilling in soft and hard wood, large section beams, joints, floor boarding, chipboard and plywood.

Lewis flute design for rapid chip removal.

Heavy-duty and precision drilling with 7/16 Hex Quick Change Shank for fast secure chuck grip and work.

Cr-coating for longer drilling life and more durable work in wood construction building, prevent from being rusty.