3PCS 4-32MM HSS Cobalt Step Drill Bit Set Nitrogen High Speed Steel Spiral For Metal Cone Triangle Shank Hole Cutter

Feature:

Specifical step design, one drill for many sizes, very convenient.

Durable.

Cutting material: iron sheet, aluminum, insulation board, PVC plate wood thickness in 4mm.The hole with a drill can play a variety of.

Specifications:

Type:step drill

Material:high-speed steel

Size:4-12mm,4-20mm, 4-32mm

Package Included:

1x 4-12mm drill

1x 4-20mm drill

1x 4-32mm drill