HSSR 10-piece Metal Spiral Drill Bit Set — 6.6 mm (for cordless screwdrivers and drills) What it is A set of 10 HSSR metal spiral drill bits, each 6.6 mm in diameter, designed for use with cordless screwdrivers and cordless drills. Made from highspeed steel for reliable cutting performance on metal. Key benefits Precise 6.6 mm size: consistent hole diameter for repeatable, accurate results in metalworking tasks. Highspeed steel construction: retains hardness at elevated cutting temperatures common in metal drilling, providing dependable performance. Spiral flute design: efficiently evacuates metal chips to reduce clogging and help maintain clean, steady cutting action. Ten-piece pack: provides spares for repeated jobs or to keep on hand across toolboxes and job sites. Cordless-compatible: made for use with cordless screwdrivers and drills, enabling portable, convenient drilling wherever you work. How it solves problems Reduces stoppages from chip buildup thanks to spiral flutes, so holes go in cleaner with fewer interruptions. Maintains cutting performance under heat, minimizing premature dulling during continuous metal drilling. The uniform 6.6 mm diameter removes guesswork when a specific hole size is required. Typical applications Sheet metal work: drilling holes in panels, brackets, and ducting for fasteners and fittings. Automotive and appliance repair: creating or enlarging holes in metal components where a consistent 6.6 mm opening is needed. Light fabrication and maintenance: installing fixtures, making access holes, or preparing metal parts for assembly. What you get Ten HSSR highspeed steel spiral drill bits, each 6.6 mm in diameter, optimized for metal drilling with cordless screwdrivers and drills.