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Insulated torque screwdriver set in red case with bits and handle

WIHA

WIHA 28791 Insulated Torque Screwdriver Set 1/4" 10-50 in-lb 8pc

SKU CH-5FE4-YDYA2

Insulated torque screwdriver set covers 10 to 50 in-lb with eight slotted and Phillips bits for live electrical work

  • TypeScrewdrivers
  • Insulated for safe work on live circuits
  • Adjustable 10 to 50 in.-lb torque range
  • Chrome-vanadium steel bits resist wear
  • Eight-piece set covers slotted and Phillips needs
  • Six-inch overall length gives good reach

Insulated Torque Set for Electrical Work

The WIHA 28791 set is an 8-piece insulated torque screwdriver kit built for professionals who work on live electrical equipment. It delivers a torque range of 10 to 50 in-lb from a 1/4 in. drive. Each driver measures 6 in. overall and uses Chrome-Vanadium steel bits in slotted and Phillips profiles sized 3 mm, 4 mm and 5.5 mm.

Fits a Technician's Pouch Not a Workbench

The compact 6 in. length lets the drivers sit in a standard tool pouch without needing a dedicated case or bench space. Insulation on every piece removes the requirement for separate protective sleeves when accessing energised panels. The 1/4 in. drive accepts the included specialty bits directly, so no additional bit holders or adapters are required to start work.

Low-Force Operation Reduces Fatigue

The adjustable torque mechanism clicks at the preset value, preventing over-tightening on sensitive terminals without demanding high hand force. Chrome-Vanadium steel resists deformation under repeated cycles, keeping the click point consistent. No external power or calibration equipment is needed for normal daily use.

Highlights

  • Insulated for safe work on live circuits
  • Adjustable 10 to 50 in.-lb torque range
  • Chrome-vanadium steel bits resist wear
  • Eight-piece set covers slotted and Phillips needs
  • Six-inch overall length gives good reach

Specifications

BrandWIHA TOOLS
TypeScrewdrivers

Questions about this item

What is the maximum torque setting before the 1/4" insulated screwdriver clicks?

The adjustable handle clicks at 50 in-lb, which is the upper end of the 10 to 50 in-lb range.

Does the insulated handle stay comfortable during continuous electrical work?

The 6 in overall length and insulated grip are designed for all-day use on live equipment without heat build-up.

Which drive bits must I already own to use the 8-piece set?

The set includes slotted and Phillips bits in 3 mm, 4 mm and 5.5 mm sizes for 1/4" drive, so no extra bits are required.

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