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The WIHA 74512 is a T7 Torx power screwdriver bit designed for use with power screwdrivers and impact-rated bit holders in professional trade applications. At 2 inches overall length with a 0.25-inch drive size, this steel-construction bit delivers consistent torque transfer in tight or standard-clearance fastening situations. Sold in a 10-piece set, it is well suited for technicians who cycle through bits frequently on high-volume service calls. Non-magnetic construction is appropriate where magnetism near sensitive components is a concern.
This bit is used across HVAC, electrical, plumbing, and general mechanical service work wherever T7 Torx fasteners are encountered. Common applications include equipment panels, access covers, control board enclosures, and light-duty assembly fixtures. The 2-inch length fits most standard bit holders and quick-change chucks used in cordless drills and power screwdrivers on the job site or in the shop.
Designed as a standard 0.25-inch drive power screwdriver bit for use with power drills, cordless screwdrivers, and impact drivers equipped with a compatible quick-change or hex-shank bit holder accepting 2-inch power bits.
Install and remove bits only with the power tool unpowered and the trigger locked out. Seat the bit fully into the holder before applying torque to prevent cam-out or premature bit wear. Inspect bits regularly for rounding or chipping and replace worn bits before they damage fastener heads.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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