3x Titanium Step Drill Bits Set 4-12mm 4-20mm 4-32mm 2 Flutes Metal Wood Plastic

Features:
Laser marking makes the size more clear;
Used on electric drills and drill presses;
Double cutting edges design enables a faster and smoother cutting;
Trilateral shank prevents slip in electric drills and presses’ chuck;
X-type openings design to facilitate the removal of cutting waste when drilling;
The sharpness and titanium coating ensure easily cut through most metal, aluminum, plastic, wood and other materials with ease;
 
Specifications:
Surface Treatment: Titanium Coated
Material: High Speed Steel
4-12mm:
Step Quantity: 5
Shank Size: 5.5mm / 0.2 inch
Total Length: 66mm / 2.6 inches
Cutting Diameters: 4mm,6mm,8mm,10mm,12mm
4-20mm:
Step Quantity: 9
Shank Size: 7.5mm / 0.3 inch
Total Length: 74mm / 2.9 inches
Cutting Diameters: 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm
4-32mm:
Step Quantity: 15
Shank Size: 9.5mm / 0.4 inch
Total Length: 100mm / 4 inches
Cutting Diameters: 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm
 
Package Contents:
1 Set x Step Drill Bits
 
Maintenance Tips:
1.Not compatible with hammer drill.
2.It is recommended to oil the bit before every use.
3.Please drill a smaller hole to make drilling smoother.
4.Please do not set drilling speed too high to avoid damages to cutting edge.
5.The metal sheet on which you want to drill should not exceed 0.38” in thickness.
6.Check the concentricity of the spindle and spring chuck and the clamping force of spring chuck, for it may cause the drill bit broken and make drill hole too large.