Dogxiong 3pcs 4-12/3-12/4-20mm 24Sizes Process Holes High Speed Steel HSS Titanium Coated Step Drill Bit Set, 1/4" Hex Shaft Drive Quick Change Multiple Industrial DIY Woodworking Punching Tools
Color: 4-12/3-12/4-20mm 24Sizes
- Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life.
- Step drill, Also known as stepped drill or pagoda drill, It is used for wood and steel drilling processing.More steps and dense make the hole smoother.
- According to the need to process different diameter holes, you can achieve one-time processing of large holes, no need to replace the drill bit and positioning hole.
- Hex shaft drives are suitable for all brands of power drills. Double cutting blade design makes for cutting faster,automatic deburring from hole when drilling.
- Can be processed thin iron plate, aluminum, insulation board, PVC board, wood and other thickness of the material within 4MM.
Details: SPECIAL FEATURES:
1. Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life. 2. The tapered design is suitable for drilling larger and deeper holes, or enlarging the aperture in areas where it has been drilled. MEASUREMENT:
#4-20mm 9 Steps (Diameter 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm)
#3-12mm 10 Steps(Diameter 3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm)
#4-12mm 5 Steps(Diameter 4mm,6mm,8mm.10mm,12mm)
3 x Step Drill Bits