Home Improvement By Z&Y

• SAVE MONEY AND SUPER CONVENIENCE----- one step drill can open a variety of apertures without the operation of change drill bits and position hole,ideal for drill large and small-diameter holes in wood and plastic.
• HSS-4221 with TITANIUM COATING----- HSS-4541 high hardness,high wear resistance and high heat resistance,Titanium coating can reduce friction and stay new.
• TWO-FLUTED DESIGN----- deburring chip ,dust and debris for providing faster,smoother cutting.
• 1/4-INCH HEX SHANK----- makes for easy, convenient bit switches and is compatible with impact ready power tools.
• WIDE USAGES----- perfect step drill bits for home DIY and general building supervision/engineering use. Suitable for workpiece with a hardness of 25 degree a thickness of 5 mm under, like carbon plate,aluminum plate,wood, PVC sheet,insulation boards,etc

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