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Black S2 steel hex bits in a storage box, 20 pieces, 2.3 inch length

Amartisan AM020 20-Piece Hex Bit Set S2 Steel 2.3" Machine Shop Hardware

SKU CH-MK3Z-WTN0F MPN AM020

A 20-piece hex bit set in S2 steel with 2.3-inch magnetic tips covering metric and SAE sizes, supplied in a storage box

  • Fit and compatibilityT4-T40
  • Product type20-Piece Hex Bit Set - NEW
  • Main materialSteel
  • Sold asAM020, 20, 5/64–5/16,1.5–8 mm
  • Number of items12 pack
  • Key featuresT4-T40
  • S2 alloy steel construction delivers hardened durability for demanding tasks
  • 10 metric and 10 SAE hex bits cover 1.5 mm to 8 mm and 5/64 in to 5/16 in
  • 3 in bit length reaches recessed fasteners in engines and electronics
  • Magnetic tips hold screws securely during assembly and repair
  • 1/4 in hex shank fits standard drill drivers and screwdriver handles

20-Piece S2 Steel Hex Bit Set

This 20-piece set supplies metric and SAE hex bits forged from S2 alloy steel with hardened and tempered construction. Ten metric sizes run from 1.5 mm to 8 mm and ten SAE sizes run from 5/64 inch to 5/16 inch. Every bit measures 2.3 inches long and carries a magnetic tip. A storage box keeps the pieces organised.

Mechanics, technicians

The kit covers common fastener sizes across automotive, motorcycle, appliance and electronics work. The 1/4 inch hex shank fits standard drill drivers and screwdrivers. Buyers who require Torx, spline or other drive profiles will need a different assortment.

S2 alloy steel with magnetic tips

The bits are forged from S2 steel then hardened and tempered for wear resistance. Magnetic tips hold fasteners during installation and removal. This material and tip combination is the primary factor when deciding if the set matches the required durability and retention.

How it compares

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

Price $18.99
Typical for this category: the median of 383 items is $17.99.

Specifications

Product
Brand nameAmartisan
Model nameAM020
Part numberAM020-Black
Product type20-Piece Hex Bit Set - NEW
Size & build
Main materialSteel
Compatibility
Fit and compatibilityT4-T40
In the box
Number of items12 pack
Environment & compliance
Certifications and standardsYes

Questions about this item

How do I install the 1/4 inch hex shank into my drill, and what step do people often miss?

Insert the 1/4 inch hex shank fully into the chuck or bit holder until it seats, then tighten securely; the step often missed is not pushing the bit all the way in, which causes wobble and stripped fasteners.

What maintenance or replacement will the S2 steel bits and magnetic tips need over time?

Wipe bits clean after each use and apply light oil to prevent corrosion; magnetic tips can lose strength if overheated or struck, so replace individual bits when edges round or magnetism fades.

What limit appears first when using these bits continuously in hard materials?

The 2.3 inch length limits reach in deep recesses, and sustained high torque in tough steel can round the hex edges before the S2 alloy yields.

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