Description
This three-piece drill bit set contains bits with a 4.2 mm (0.165 inch) diameter and a hex shank for use in compatible chucks and bit holders. The bits are made from M35 cobalt high-speed steel and feature a 135-degree polished point, a geometry often used for general metal drilling and for starting holes with reduced walking on suitable surfaces. The hex shank format is intended for quick fitting into compatible quick-change adapters, drill chucks and powered drivers where a hex connection is accepted. Typical uses include small hole preparation in metal, plastic and some workshop materials, as well as maintenance and assembly tasks where a specific 4.2 mm hole is required. The three-piece quantity allows users to keep a spare bit close at hand or to divide the set between toolboxes. Users should confirm that the chuck or adapter accepts the hex shank and should select drilling speed according to the material and equipment used.
