STAINLESS STEEL HEXALOBULAR DRIVE BITS

Hexalobular Drive Bits — Widely known by the Torx trade name, the hexalobular recess uses a six-point star profile that gives close, near-perpendicular contact between bit and screw, which is why it resists cam-out at higher torque far better than either Phillips or Pozidriv cross-point recesses. This is the standard, non-security version of the pattern, machined without a centre pin, and it's the one to reach for on general engineering, automotive, machinery, and electronics assembly wherever torque needs to be transmitted cleanly and repeatedly without rounding the recess or slipping the bit — a common requirement on powered assembly lines and higher-torque structural fixings alike. Hexalobular recess geometry and sizing are standardised under ISO 10664, so bits and screws are matched using a T-number (T10, T20, T27, and so on) rather than by diameter, and getting that number right for the screw in hand is what keeps the bit properly seated rather than partially engaged. It's important not to confuse this with the Hexalobular + Pin security version found elsewhere in this range: that variant has an identical six-lobe profile but adds a raised pin at the centre of the screw's recess, and a standard hexalobular bit like this one has a solid tip with no bore to clear that pin, so it will simply bottom out and fail to engage a security screw at all. As a driving tool, the bit is generally made from hardened alloy tool steel rather than stainless, since wear resistance and impact toughness under repeated torque cycling matter more for a bit than corrosion resistance does — a softer or stainless bit would round out considerably faster under regular use. Most bits in this range use the quarter-inch hex shank standardised under ISO 1173, making them interchangeable across screwdriver handles, bit holders, and power tool chucks. Choosing hexalobular over Phillips or Pozi generally comes down to expected torque and duty cycle: for occasional, hand-driven fixings any of the three will do the job, but for repeated high-torque or powered driving, the larger contact area of a hexalobular recess means longer bit life and fewer rounded screw heads over time.

FAQs
What do the T-numbers stamped on hexalobular bits refer to?
They refer to standardised recess sizes under ISO 10664, with higher numbers indicating larger bits and screws; the correct T-number for a given screw is generally confirmed against the screw manufacturer's specification rather than judged by eye.

Is "Torx" the same thing as hexalobular?
Torx is a specific manufacturer's trademark for the hexalobular profile, though the recess is now widely produced generically and simply described as hexalobular or six-lobe in most fastener catalogues.

Can a bit for one T-size be used on a slightly different size screw?
Not reliably — an undersized bit rounds the recess under torque, and an oversized one won't seat fully, so matching the exact T-number to the screw is worth checking rather than assuming a close size will do.