5-piece set of inch step drill bit set / step drill / steel plate drill / twist drill / export reaming drill

Name : Roasted yellow step drill 5PC aluminum box

Product configuration: aluminum box *1

1/4-1-3/8"*1

3/16-7/8"*1

1/4-3/4"*1

1/8-1/2"*1

3/16-1/2"*1

Weight: 455g or so, aluminum box size: 15*11*4.5cm, OPP plastic bag weight 295g

Handle: triangular round handle

Material: High speed steel 4241: Suitable for workpieces below 25°, such as carbon steel, iron plate, steel plate

specification:

1) Step drill 3/16-1/2'' (3/16, 1/4, 5/16, 3/8, 7/16, 1/2)

2) Step drill 1/8-1/2'' (1/8,5/32.7/32.1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/ 16,15/32, 1/2mm)

3) Step drill 1/4-3/4'' (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/ 4)

4) Step drill 3/16-7/8'' (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/ 16,3/4,13/16,7/8)

5) Step drill 1/4-1-3/8'' (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8)