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Twenty black hex bits in a clear plastic case, metric and SAE sizes, quarter-inch shanks

WORKPRO 20pcs Hex Bit Set S2 Steel 2.3in Metric SAE 1/4in Shank Machine Shop Hardware

SKU CH-ESAT-P42A2

A 20-piece hex bit set in S2 steel with magnetic 1/4-inch shanks, 2.3-inch length, and metric plus SAE sizes in a storage box

  • Fit and compatibilityHex head bolts and screws
  • Product typeHex
  • Main materialSteel
  • Sold as20, Hex
  • Key featuresHex head bolts and screws
  • Premium S2 alloy steel with phosphated finish resists wear in industrial applications
  • CNC machined tips and hardened core reduce fracture risk under high torque
  • Strong magnetic square tips hold screws in deep or narrow spaces
  • 1/4 inch quick-change shank fits electric drivers, sockets and drill kits
  • Includes 10 metric and 10 SAE bits plus storage box for organisation

20-piece S2 steel hex bit set

This 20-piece set supplies metric and SAE hex bits machined from heat-treated S2 alloy steel. The 1/4-inch square shank fits standard quick-change holders on drill drivers, impact drivers and hand screwdrivers. It targets technicians and DIY users who need a single organised kit for mixed fastener standards.

Magnetic tips and 2.3-inch reach

Each bit measures 2.3 inches long, allowing access to recessed or deep-set screws in engine bays, electronics enclosures and furniture joints. Strong magnetic tips hold fasteners during placement and retrieval in narrow spaces. The phosphated black finish resists corrosion but does not eliminate the need for dry storage.

CNC-machined tips with storage case

CNC precision machining on every tip reduces cam-out and fracture risk under high torque. The included plastic case separates the 10 metric and 10 SAE sizes for quick identification. Bits are not rated for impact-only applications and should not be used with hammer drills or dedicated impact wrenches beyond their design limits.

How it compares

Measured against everything we stock in Workshop Hardware, Springs & Clamps, at today’s prices. Recalculated every night.

Price $20.99
Pricier than about 58% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameWORKPRO
Product typeHex
Size & build
Main materialSteel
Compatibility
Fit and compatibilityHex head bolts and screws

Questions about this item

Which set covers the metric sizes I need for machinery?

The kit includes ten metric bits at 1.5, 2, 2.5, 3, 3.5, 4, 5, 6, 7 and 8 mm, all 2.3 in long.

What does the 2.3 in length mean when I am reaching into a deep cavity?

Each bit extends 2.3 in from the chuck, giving extra reach for recessed fasteners without an extension bar.

Will the 1/4 in square shank lock into my impact driver?

The 1/4 in hex shank fits standard quick-change chucks on drill drivers and impact tools.

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