3 Pcs/Set HSS Spiral Groove Step Drill Titanium Coated Bit Kit for Iron Aluminum Plate Cutting Holes,Default NO5238

Features:

1/4\" Hex shaft drives are suitable for all kinds of power drills.

Double cutting blades design makes for cutting faster,automatic deburring from hole when drilling.

3Pcs spiral step drill bits, 4-12/4-20/4-32mm 29Sizes,main material high speed steel, titanium coated high quality step drill bits.

Description:

Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life.

The tapered design is suitable for drilling larger and deeper holes, or enlarging the aperture in areas where it has been drilled.

Usage:

Cutting holes in materials(hardness:

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