Average saving in this category: 26.7% (avg difference: 7.91)
Based on 1499 products

Hex 5/16″ Impact Driver Bit – Railer Allen Wrench Drill Hex Bits. 1/4 Quick Release S2 Steel 2 inch 5/16″ Hex Bits. (5 Pack) Hex 0.313″

What people love (and don’t love)

What people love

  • High-quality S2 steel that is tough and durable
  • Fits bolts precisely and reduces stripping or rounding
  • Strong grip and reliable performance for various applications
  • Good value for the price with solid construction
  • Useful for specialty uses like Tesla charger installation and flood barriers
  • Fast delivery and well-made design praised by users

What people don’t love

  • Some reports of bits breaking or cracking with hand use
  • Color coating peeling off during use
  • The bit length could be longer for recessed or tight spaces
  • Some confusion with Phillips bits mentioned in reviews

Overall, these impact driver bits offer great durability and precision but may have occasional longevity issues.

Summary based on customer review evidence.

Quick facts

  • Brand: Railer
  • Price: USD 9.99
  • Rating: 4.70 (550 reviews)

If you drive a lot of 5/16″ hex head screws and bolts, having a few dedicated bits on hand can save time on swaps and downtime. This Railer set includes five 2-inch (0.313″) 5/16″ hex impact driver bits designed for impact power tools.

Built from premium S2 steel, these bits are made to handle high-torque work. The precise-machined tip is intended to seat cleanly to help reduce stripping, while the optimized torsion zone is designed to absorb torque and help cut down on bit breakage. A 1/4″ quick-release shank makes them easy to use with compatible drivers and holders.

  • 5-pack of 2-inch 5/16″ hex impact driver bits (0.313″)
  • Premium S2 steel, optimized for impact power tools
  • Precise machining for an exact-fit tip to help reduce stripping
  • Heat-hardened to withstand tough jobs
  • Torsion zone helps absorb torque and reduce bit breakage

Compatibility: Designed for hex head screws and bolts, size 5/16″ or larger, with a 1/4″ shank interface.