• 4-12mm HSS step drill tail (trapezoid drill bit) for 9-step white iron, spiral body design, fast chip removal speed and high work efficiency
• Spiral step drill can drill holes of various specifications with one drill bit
• Step drill bit, durable and long service life
• HSS step drill tail step drill bit step drill bit spiral step drill hexagonal head step drill pagoda drill bit hole opener ladder round hole drill

Be applicable:

• Tinplate, copper, iron sheet

Product specifications:

• 9-step size: 4, 5, 6, 7, 8, 9,10, 11, 12mm
• Material: HSS M35
• Handle: 1/4” hex handle

Origin:

• Taiwan