Hottptyer Hole punching drill Bit Set 0.5 to 1.4mm with Storage Box High hardness engraving twist supports watch strap positioning ring design for machine

[HIGH HARDNESS] Made of quality material with high hardness and wear resistance these twist drill bits support repeated drilling engraving and hole punching tasks while maintaining consistent cutting performance across common applications. [WATCH STRAP WORK] Designed for common drilling jobs such as punching holes in watch straps these bits help create clean openings for repair craft and small workshop projects with suitable size options from 0.5 to 1.4mm. [POSITIONING RING] The humanized positioning ring design helps set the drilling depth before operation and can reduce machine debugging time. It supports more controlled handling when working on small parts and detailed surfaces. [PROTECTIVE STORAGE] A storage box keeps the drill bits organized between tasks and helps protect them from dust and dirt. The compact case also makes it easier to identify the needed size and maintain a tidy work area. [WIDE APPLICATION] This twist drill bit set is suitable for a variety of industries and practical jobs including watch strap repair engraving hole punching and other small drilling tasks that require compact cutting tools.