Features:

(Note: Please make sure that the thickness of workpieces is no more than the height of step before buying the step drill bit.
Please install the step drill bit onto the pistol drill and bench drill, whose spiral speed of 250-400R/M is recommended.)

Surface:
The step drill bit is made from high-speed steel containing cobalt and through heat treatment, which can improve its hardness and abrasive resistance, and enhance its toughness and bending strength.
The blade of bit will be sharper.
And it is the product ideal for processing the stainless steel.

Material:
HSS-Co(M35)： The step drill bit is made from the high-speed steel containing cobalt.
It is used for drilling and processing work-pieces, whose hardness is less than 28 degrees, such as stainless steel, aluminum, carbon steel, sheet-iron, insulation board, PVC panel and plank.

Specification:
Thickness of workpieces/Height of step:5mm
Size of steps:
001 ranging from 3mm to 12mm, 9 steps
002 ranging from 4mm to 22mm, 10 steps
003 ranging from 6mm to 24mm, 11 steps
004 ranging from 4mm to 12mm, 9 steps
005 ranging from 4mm to 30mm, 14 steps
Difference between adjacent steps:
001 1mm
002 2mm
003 2mm
004 1mm
005 2mm
Style of flute: spiral flute.
Material:HSS-Co
Surface:containing cobalt

Package Included:
5pcs Containing Cobalt Spiral Flute HSS-Co Step Drill Bit

• It can remove the spikes and countersink at the same time while drilling.
• The step drill bit is usually used for drilling holes onto the thinner panels.
• Compared with the common bits, the step drill bit sways little and can drill the perfect holes without the center punch.
• In the unique step-shaped design, one bit can drill holes of various sizes so that one step drill bit is equal to many common bits.

It can remove the spikes and countersink at the same time while drilling.HKATOPS