3pcs Hss Steel Titanium Step Drill Bits 3-12mm 4-12mm 4-20mm Step Cone Cutting Tools Steel Woodworking Wood Metal Drilling Set

Features:

Automatically Deburrs Holes As You Drill 

Two-Flute Design Gives You Faster And Smoother Cutting 

Titanium Nitride Coating For Cooler Running 

Quick-Change 1/4'' Hex Shank 

High Speed Steel For Long Life 

These Step Drill Bits Are Ideal For Variety Of Materials From Metal, Plastic, Fiberglass To Wood 

They Also Help To Enlarge Existing Holes 

The Two Flute Design Tips Can Make The Penetration Faster Without Chipping 

3 pcs Titanium HSS Cone Step Drill Bit Set Imperial 1/4'' Hex Shank 

3 pcs 1/4'' Large HSS Hex Shank Titanium Cone Coated Step Drill Bit Set with case 

3 pcs Large HSS Steel Step Cone Drill Titanium Bit Set Hole Cutter 

Specification: 

Material: HSS 

1/4'' Hex Shank 

Sizes: (approx.)

3-12mm:3, 4, 5, 6, 7, 8, 9, 10, 11, 12 mm/ 0.12, 0.16, 0.20, 0.24, 0.28, 0.31, 0.35, 0.39, 0.43, 0.47 in

4-12mm:4, 6, 8, 10, 12 mm/ 0.16, 0.24, 0.31, 0.39, 0.47 in

4-20mm:4, 6, 8, 10, 12, 14, 16, 18, 20 mm/ 0.16, 0.24, 0.31, 0.39, 0.47, 0.55, 0.63, 0.71, 0.79 in

4241 High-Speed Steel HSS (Suitable For Use In The Workpieces Whose Hardness Is 25 Degrees Such As Carbon Steel, Plate, Insulation Board, and Wood Board) 

Packing list:

3 * Step Drill Bit With Bag