H HOME-MART HSS Step Drill Bits 3 Pcs Set
A variety of diameter sizes of drilling, reaming, chamfering, deburring and drilling,A ladder drill can meet your different needs.
Unique step structure, one drill can open various sizes of aperture, a ladder drill to a box bit.
Scope of application: automotive sheet metal, repair and modification, bridge doors and windows, home appliances.
Can be used for the following equipment: hand-held drilling machine, drilling machine milling machine, machining center.
Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life
SPECIFICATION
Material: Titanium Coated High Speed Steel
Type of Slot: Straight Groove
Size: 3-12, 10 Steps (Diameter 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm)
Size: 4-12, 5 Steps (Diameter 4, 6, 8, 10, 12mm)
Size: 4-20, 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm)
Package: 3Pcs Straight step drill bits,600D Oxford storage bag
Going by previous pricing on CCC this is not a bargain.