HSS Step Drill Bit Set – Titanium Coated for Wood and Metal – 3-12mm, 4-12mm, 4-20mm – Core Cone Drilling Tools with Straight Groove – Efficient Hole Cutter

Applicable People: Universal
Item ID: EM07725
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Made From High Quality HSS Steel
Function: Deburring, Chamfering, Cutting Or Expanding Holes
Supporting Tools: Pistol Drill, Hand Drill, Charging Drill, Bench Drill. (Water Injection Cooling While Working, It Can Effectively Extend The Service Life Of The Drill Bit, Especially In The Case Of Continuous Drilling)
Rotating Speed:
3-12 Speed:260-400
4-12 Speed:260-400
4-20 Speed:180-240
Suitable Material: Workpieces With General Hardness, Such As Wood, Plastic, PVC Plate, Iron Plate, Plate Thickness Within 3MM. Please Note That Stainless Steel And Spring Steel Are Not Applicable.
Length: 
3-12mm Length: Approx. 7.9cm/ 3.11″
4-12mm Length: Approx. 6.7cm/ 2.64″
4-20mm Length: Approx. 7.4cm/ 2.91″
The  Cutters Come In The Following Sizes:
3-12mm: (3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm) 10 Steps
4-12mm:
(4mm, 6mm, 8mm, 10mm, 12mm) 5 Steps
4-20mm:
( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 9 Steps
Package Included:
1pc Drill Bit  3-12mm Or
1pc Drill Bit  4-12mm Or
1pc Drill Bit  4-20mm Or
3pcs(1pc 3-12 + 1pc 4-12 + 1pc 4-20) In Opp Bag Or
3pcs(1pc 3-12 + 1pc 4-12 + 1pc 4-20) In Cloth Bag