A metal spiral hole saw bit with a hex shank, featuring engraved size markings '7/8' and '4-1/8'.
A metal conical drill bit with a threaded shank and hexagonal end, shown on a plain white background.
Metallic spiral front of drill bit on a white background
Metal drill bit on a white background
Klein Tools drill bit with features highlighted on a white background
A product information graphic for two Klein Tools aluminum titanium nitride (Aitin) drill bit sets, QRST11 and KTSB11. The graphic features two angled views of the dark metallic drill bits at the top, with a yellow and gray table below detailing specifications such as shaft size, use with drill types, and flute patterns.
Close-up of gloved hands holding a drill and a drill bit.
A metal spiral hole saw bit with a hex shank, featuring engraved size markings '7/8' and '4-1/8'.
A metal conical drill bit with a threaded shank and hexagonal end, shown on a plain white background.
Metallic spiral front of drill bit on a white background
Metal drill bit on a white background
Klein Tools drill bit with features highlighted on a white background
A product information graphic for two Klein Tools aluminum titanium nitride (Aitin) drill bit sets, QRST11 and KTSB11. The graphic features two angled views of the dark metallic drill bits at the top, with a yellow and gray table below detailing specifications such as shaft size, use with drill types, and flute patterns.
Close-up of gloved hands holding a drill and a drill bit.
Klein Tools
MFR #KTSB11
UPC #92644591112

Klein Tools 2-Step Drill Bit - ⅜" Hex Double Straight Flute (Size: ⅞" to 1 ⅛"), Model KTSB11

$64.97 In Stock
Shipping within Ontario only. Rates calculated at checkout.

Pickup available at IES - Mississauga

Usually ready in 4 hours

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Klein Tools 2-Step Drill Bit - ⅜" Hex Double Straight Flute (Size: ⅞" to 1 ⅛"), Model KTSB11
$64.97

This Klein Tools 2-step drill bit is engineered for electricians and contractors who need to punch clean, precise holes in steel enclosures, panels, plastic, wood, and aluminium on the job site. The double straight flute design continuously clears chips for cleaner cuts, while the aluminium titanium nitride (AlTiN) coating delivers 10 times the wear resistance of standard black oxide bits for significantly longer service life. A fast-starting, non-walking tip and 3/8" hex shank ensure positive chuck engagement and consistent, accurate drilling through two hole sizes from 7/8" to 1-1/8".

Specifications

Brand Klein Tools
Type Step Drill Bit
Number of Steps 2
Hole Size Range 7/8" to 1-1/8" (22.2 to 28.6 mm)
Shank Type 3/8" Hex
Flute Type Double Straight
Material High Speed Steel (HSS)
Coating Aluminium Titanium Nitride (AlTiN)
Compatible Materials Steel (up to 16 gauge), Wood, Plastic, Aluminium
Markings Laser-Etched Size Identification
Overall Length 3.22 in (8.2 cm)
Weight 3.68 oz (104 g)