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38-piece precision bit set in transparent case

DeWalt Precision S2 Steel 4mm 38pc Bit Set

SKU CH-ABWX-KWYNR

38-piece S2 steel precision bit set with Phillips, flathead, Torx, security Torx, pentalobe, hex, tri-wing, triangle and U-shaped profiles in a marked storage case

  • Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
  • Certifications and standardsADA Compliant
  • Main materialSteel
  • Sold asBox
  • Number of items1 pack
  • 38 precision bits cover MacBook, iPhone and console repairs
  • S2 alloy steel with extra heat treatment resists wear
  • 28 × 4 mm shank fits most precision drivers
  • Laser-marked sizes on every bit speed identification
  • Transparent hard case keeps bits organised and protected

Precision bit set for electronics repair

The DeWalt Precision S2 Steel set contains 38 bits sized at 28x4x4mm, covering Phillips, Flathead, Torx, Torx Security, Pentalobe, Hex, Tri-Wing, Triangle, U-shaped and MID profiles. Each bit is made from S2 alloy steel with extra heat treatment for hardness and toughness. The transparent case keeps every piece organised and identifiable by clear, deep markings.

Durable S2 steel resists wear in daily use

Heat-treated S2 alloy steel maintains precise dimensions through repeated fastening cycles, reducing cam-out and fastener damage. The dual-gauge testing confirms each bit meets exact size specifications before packaging. Hardened tips withstand the torque demands of precision screwdrivers without rounding or stripping.

Fits most 4mm precision drivers

The 4mm shank fits standard precision screwdriver handles and bit holders used for MacBook, iPhone, iPad, game consoles and eyewear repairs. Compact case replaces loose bit collections and eliminates the need for multiple specialised kits. Clear markings let technicians select the correct profile at a glance.

How it compares

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

Price $13.99
Cheaper than about 70% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameDeWalt
Model nameHand Rivet Nut Setter Kit
Part numberBB01
Size & build
Main materialSteel
Compatibility
Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
In the box
Number of items1 pack
Environment & compliance
Certifications and standardsADA Compliant

Questions about this item

How do I insert the 28x4x4 mm bits into my precision screwdriver without damaging the holder?

Align the 4 mm hex shank straight into the collet, push until it seats fully, then tighten the chuck gently; forcing it at an angle rounds the shank corners and causes wobble.

Which bits in the 38-piece set will wear first and need replacement?

The smallest Phillips 000, Torx T2 and Pentalobe 0.8 bits see the highest torque per contact area and typically round off before the larger Hex or Flathead bits.

What limits continuous use before the bits overheat or deform?

S2 steel with extra heat treatment resists hardness loss, but sustained high-speed driving in dense material can raise tip temperature enough to soften the smallest 0.8–1.5 mm profiles first.

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