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Westward 6EXN4 step drill bit, high-speed steel, black oxide finish, 12 holes, 3/8 inch shank

Westward

Westward 6EXN4 Step Drill Bit 12 Hole 3/16-7/8 In Pneumatic Accessory

SKU CH-K3JR-1JPK5 MPN 6EXN4

Drills 12 hole sizes from 3/16 to 7/8 inch in high-speed steel with oxide coating

  • Product typeDrill Accessories
  • Main materialHigh Speed Steel w/Oxide Coated Finish
  • Drills 12 different hole sizes with a single bit
  • High-speed steel with oxide coating resists wear during use
  • Straight three-flat shank prevents slipping in the chuck
  • Maximum drilling depth of 3.5 mm suits thin materials
  • California Proposition 65 warning applies to this product

12-Hole Step Range

The Westward 6EXN4 is a high-speed steel step drill bit with an oxide-coated finish. It creates twelve incrementally sized holes from 3/16 in to 7/8 in using a single bit. The 3/8 in shank features three flats for secure chuck grip in hand-held or press-mounted tools. Maximum drilling depth is 3.5 mm per step.

Sheet Metal and Thin Plate Work

This bit suits electricians, HVAC technicians and maintenance staff drilling enclosures, junction boxes or ducting up to 3.5 mm thick. Buyers who need to drill thicker plate, larger diameters or blind holes beyond the stepped profile should look at alternative tooling. The straight three-flat shank will not fit quick-change hex drivers without an adapter.

3.5 mm Maximum Depth

The 3.5 mm drilling depth per step determines whether this bit can complete the required hole in one pass. If the workpiece exceeds this thickness, the bit cannot reach full diameter without secondary operations. Verify material thickness against this figure before purchase.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $28.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

Product
Brand nameWestward
Model name6EXN4
Product typeDrill Accessories
Size & build
Main materialHigh Speed Steel w/Oxide Coated Finish

Questions about this item

Will the 3/8 in shank on this 12-hole bit fit my older 3/8 in chuck drill?

Yes, the straight shank with three flats measures 3/8 in and is designed for standard 3/8 in drill chucks.

How can I confirm the bit is cutting cleanly after I start using it?

Each of the 12 steps should produce a round, burr-free hole; the black oxide coating helps reduce friction so you see smooth walls and consistent chip ejection.

Does the package include any lubricant or only the bit itself?

Only the step drill bit is supplied; cutting fluid or lubricant must be purchased separately.

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