3pcs 4-12/20/32mm HSS Step Drill Bit Set TiAlN Coated Spiral Grooved Hole Cutter

Three pieces of metric staircase drill 4-12,4-20,4-32; 3pcs 4-12/20/32mm HSS Step Drill Bits Set Spiral Grooved Hole Cutter

 

Type: step drill

Material: high-speed steel

Case size:12.5*9.5*3.5cm

Size:

#1: 4-12mm 5 steps(4mm,6mm, 8mm, 10mm, 12mm)

#2: 4-20mm 9 steps(4mm, 6mm, 8mm, 10mm, 12mm,14mm, 16mm,18mm, 20mm)

#3: 4-32mm 15 steps(4mm, 6mm, 8mm, 10mm, 12mm,14mm, 16mm,18mm, 20mm, 22m, 24mm, 26mm, 28mm, 32mm)

 

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

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

SELF STARTING - No need for a pilot hole.  

Automatically deburrs holes as you drill. 

Long Life True high speed steel. 

Nitriding to make it durable and run cooler.

Includes protective padded aluminum case.