Set of four coated hex shank step cone drill bits for hole cutting Sizes included 1.22 mm 2.22 mm 3.22 mm 4.22 mm Key benefits Step cone design delivers multiple hole diameters in a single tool, enabling precise, clean holes with minimal drilling passes Coated surface reduces friction and heat buildup, enhancing cutting efficiency and bit life Hex shank provides a secure hold and broad compatibility with standard drill chucks and hex drive systems Built specifically as a hole cutter with a stepped profile to improve control and reduce wandering on thin materials What makes it stand out Four sizes in one set, offering versatility for small to mid range hole sizes Coated finish for smoother cutting and reduced wear over time Clear, consistent step geometry helps achieve consistent hole expansion from small to larger diameters Specifications and attributes Function: hole cutter with step cone geometry Shank type: hex shank Coating: coated Design: step cone drill bit Included sizes: 1.22 mm, 2.22 mm, 3.22 mm, 4.22 mm Compatibility and use Suitable for drilling in common materials where thin sheets or panels require precise stepped holes Designed for use with drills or drivers that accept hex shank bits Usage scenarios Electrical and electronics enclosure work: create precise small through holes for cables or fasteners in metal or plastic panels Sheet metal fabrication: establish gradually larger holes without changing bits, improving workflow on multiple hole sizes DIY projects and hobby metalworking: produce accurately sized holes in thin metals or plastics for mounting, routing, or cable management Care and handling Use appropriate drill speed and moderate feed pressure for results Keep the coated surfaces clean and of debris to maximize wear resistance Allow the bit to cool between heavy cuts to prevent overheating Notes This description preserves the four size variants and the capsulated features of the original product set, including hex shank, step cone design, and coated hole cutter functionality.