4 X 4″ Extra Long Combined Drill Bit and Countersink HSS 5/16″ Round Shank DEW4X4 Fast Shipping

Industrial grade combined drill bit and countersink for professional metal fabrication. The integrated cutting geometry enables drilling and countersinking during a single operation, delivering consistent countersink diameter and angle for deep holes and through-holes.

Specs

Dimensions: Length 4 inch; Shank diameter 5/16 inch

Drive type: Round shank

Material grade: HSS

Features

Combined functionality: Drills and countersinks in a single operation, reducing setup time and ensuring flush countersink seating.

Material: HSS core provides wear resistance and suitability for drilling metal alloys, including steel and cast iron.

Extra long reach: 4 inch overall length enables access to recessed areas and deep pockets with maintained rigidity.

Shank compatibility: 5/16 inch round shank fits standard drill chucks and collet systems common in industrial equipment.

Integrated countersink geometry: Countersink profile designed to produce consistent seat angles and flush finishes on metal substrates.