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A silver-grey twist drill bit with black oxide coating, jobber length, 21/32 inch size

Drill America

Drill America 21/32in HSS Black Oxide Jobber Drill Bit

SKU CH-RFJG-HHMG2

A 21/32 inch high-speed steel drill bit with black oxide coating for general-purpose drilling in metal, wood and plastic

  • Product typeDrill Accessories
  • Precise drilling with 21/32in HSS black oxide construction
  • Extended reach via 5-3/16in flute length
  • Durable high-speed steel resists wear
  • Jobber length design fits standard chucks

21/32 inch HSS jobber bit for general drilling

This 21/32 inch high-speed steel drill bit has a black oxide surface treatment and a jobber length profile. The decimal equivalent is .6563 with a flute length of 5-3/16 and an overall length of 7-1/8. It suits general-purpose drilling in metal, wood and plastic for trade and DIY users.

Practical limits of the jobber length standard

The jobber length design provides a standard reach for common drilling depths but is not intended for deep-hole applications. The black oxide finish aids chip flow and reduces galling in ferrous materials yet offers less wear resistance than coated alternatives. Buyers needing extended reach or high-volume production tooling should consider other lengths or surface treatments.

How it compares

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

Price $19.99
Cheaper than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

Should I choose the 21/32 inch size or a different diameter for my project?

The 21/32 inch bit creates a .6563 decimal equivalent hole; select it when your plans call for that exact diameter, otherwise pick the size matching your required hole.

What does the 5-3/16 inch flute length mean when the bit is in my drill?

You can drill up to 5-3/16 inches deep before the flutes fill with chips, so the hole depth is limited to that length in a single pass.

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