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 titanized surface can improve its abrasive resistance.
Material:
HSS 4241：The step drill bit is made from HSS 4241.
It is used for drilling and processing the work-pieces, whose hardness is less than 25 degrees, such as carbon-steel plate,
sheet-iron, insulation board, PVC panel and plank. Please note that this product is not for processing the stainless-steel.

Specification:
Thickness of workpieces/Height of step:5mm
Step diameter:
001: 3/16''(4.76mm), 1/4''(6.35mm, 5/16''(7.94mm), 3/8''(10.35mm), 7/16''(11.11mm), 1/2''(12.7mm) ,6 steps
002: 1/4''(6.35mm), 5/16''(7.94mm), 3/8''(10.35mm), 7/16''(11.11mm), 1/2''(12.7mm, 9/16''(14.28mm), 5/8''(15.88mm), 11/16''(17.46mm), 3/4''(19.05mm),9 steps
003:1/8''(3.18mm), 5/32''(3.97mm), 3/16''(4.76mm), 7/32''(5.56mm), 1/4''(6.35mm), 9/32''(7.14mm), 5/16''(7.94mm), 11/32''(8.73mm), 3/8''(9.53mm), 13/32''(10.32mm), 7/16''(11.11mm), 15/32''(11.91mm), 1/2''(12.7mm),13 steps

Style of flute: straight flute.
Material:HSS 4241
Surface:titanized

Package Included:

3pcs Titanized Straight-fluted HSS 4241 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