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Twenty black phosphate S2 steel hex bits in a case, 50 mm long, 1/4 inch magnetic shanks

NSI

NSI 20Pc Impact Hex Bit Set S2 Steel 1/4 Hex Shank Magnetic 50mm

SKU CH-KXQ7-D15N9

Twenty-piece S2 steel hex bit set covering metric and SAE sizes with magnetic 1/4" shanks for impact drivers

  • Labor warranty1 Year
  • Size or dimensionsMetric (1.5 mm to 8 mm), SAE (5/64 in to 5/16 in)
  • Main materialS2 Steel
  • Product typeHammer Drill Accessories
  • Parts warranty1 Year
  • 20-piece set covers metric and SAE fasteners with 10 sizes each
  • S2 alloy steel with CNC-machined tips resists wear in high-torque use
  • Black phosphate coating protects bits from corrosion during storage
  • 1/4-inch hex shanks allow quick changes in impact drivers
  • Magnetic tips hold screws securely for faster one-handed driving

20-Piece Impact Hex Bit Set

This 20-piece impact hex bit set covers metric sizes from 1.5mm to 8mm and SAE sizes from 5/64 to 5/16 inch. It suits DIY enthusiasts and professionals needing a broad range of hex fasteners for household, woodworking and automotive tasks. Each bit shares a uniform 50mm length for consistent reach. The set delivers 10 metric and 10 SAE options in one package.

S2 Steel Bits with Magnetic 1/4 Hex Shanks

Bits are forged from S2 alloy steel with CNC-machined tips for precise fit in fastener heads. A black phosphate coating adds corrosion resistance for longer service life. The 1/4-inch hex shanks feature a quick-release design that locks securely into impact drivers and drill chucks. Strong magnetic tips hold screws firmly, reducing drops and speeding up repetitive fastening work.

Durable Coating and Efficient Power Transfer

The anti-corrosion finish protects the steel during daily use in damp or outdoor conditions. Magnetic tips keep fasteners engaged, so less torque is wasted on wobble or re-seating screws. Hardened S2 steel withstands the high impulse loads of impact drivers without premature rounding. The uniform 50mm length keeps the working distance predictable across all 20 bits.

How it compares

Measured against everything we stock in Power Drills, Drivers & Cutting Bits, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 81% of the 2,412 comparable items (median $81.99).

Specifications

Product
Brand nameNSI
Product typeHammer Drill Accessories
Size & build
Size or dimensionsMetric (1.5 mm to 8 mm), SAE (5/64 in to 5/16 in)
Main materialS2 Steel

Questions about this item

What does the 1/4" hex shank limit in practice?

The 1/4" hex shank fits any drill, impact driver or quick-release chuck that accepts 1/4" bits, so the interface caps compatibility at that shank size.

What clearance does the 50mm bit length need to fit?

Each bit is 50mm long, so allow at least that depth plus the chuck length in the workpiece or driver for full engagement.

How are the bits installed and what step is often missed?

Insert the 1/4" hex shank into the chuck until it locks; the step often missed is verifying the magnetic tip actually holds the fastener before driving.

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