Wiha 28502 TorqueVario-S Adjustable Torque Screwdriver (5-10 In-Lb)
CERTIFIED tier
Wiha has manufactured precision hand tools in Schonach, Germany since 1939, and the 28502 TorqueVario-S is its adjustable torque screwdriver calibrated for the 5-to-10-inch-pound range — the precise band required for watch movements, scope rings, electronics enclosures, and bicycle stem hardware.
Origin
Made in Germany
Warranty
Wiha No Hassle 12-month repair-or-replace guarantee with individual calibration certificate; flat-fee recalibration available after warranty period; accuracy ±6% maintained to 5,000 cycles or 1 year
Price
~$108 (Mid)
Community
Reddit r/BuyItForLife Approved
The internal cam-and-spring mechanism delivers a tactile and audible click when the set torque is reached, with a stated accuracy of ±6 percent maintained through 5,000 actuations or one year, whichever comes first. Each unit ships with an individual calibration certificate and a serial number for traceability.
The window-style scale on the handle eliminates the kind of dial-misread errors that produce stripped optics threads, and the hex-shank bit interface accepts standard 4mm bits, making blade replacement a swap rather than a service call. Wiha's No-Hassle 12-month guarantee covers repair or replacement for any reason, and the brand will recalibrate the tool for a flat fee after the warranty period — a service most cheap torque drivers don't offer because their internals aren't worth repairing.
At roughly $108, a Wiha 28502 used three times a week pays for itself the first time it prevents a stripped thread on a $400 scope mount. For the tens of thousands of trades that require torque accuracy below 1 Nm, this is the reference tool.