28 sizes in 3:The bits set includes three standard step drill bits which can replace 28 individual drill bits.
High durability:Made of H.S.S. 4241 and titanium coating ensures good protection to avoid damage in using.
Easy operation: Double cutting blades and X-type openings design ensures a faster and smoother cutting,Provided with small pressure when drilling,it can also automatically deburr holes while drilling to keep the drill bit clean.
Wide usage:Marks hole locations,drill,remove screws,cut through the wood,sheet metal, steel and other surfaces.
Automatic center punch:Delivers an automatic,high-impact,spring-loaded strike when pressed against surface,adjustable cap regulates striking force.
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