Material: high speed steel HSS 4241
​Name: spiral staircase drilling 4-12mm, 4-20mm, 4-32mm
Cutting material: iron sheet, aluminum, insulation board, PVC plate wood thickness in 4mm.The hole with a drill can play a variety of.
Material: high speed steel 4241 (for use in the following parts, the hardness of 25 degrees as Tan Gang)
Specifications
4- 12mm 5 (4mm, 6mm, order 8mm, 10mm, 12mm)
4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)
4 - 32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm)
