Wiha® 28789 TorqueVario-S® Insulated Torque Control Screwdriver Set – 11-Piece 

Official 1000V VDE Safety Insulation. Verified +/- 6% Precision Torque Accuracy. 33% Thinner Profile Integrated SlimLine Blades.

The Wiha 11-Piece Insulated TorqueVario-S Screwdriver Set brings certified high-voltage shock defense, precise incremental torque tracking, and deep-recessed terminal access directly to your commercial maintenance loadout. Purpose-built to eliminate the dangerous risks of over-tightening sensitive electrical connections, short circuits caused by uninsulated hand tools, and loose wiring faults from under-torqued lugs, this premium German-engineered adjustable torque driver is an essential trade safeguard. It arms master industrial electricians, control panel technicians, and renewable energy grid installers with a high-accuracy torque matrix optimized to seat terminal blocks, wire commercial circuit breakers, calibrate solar arrays, and complete live line operations up to 1,000 Volts.

Rigorous electrical protection and traceable quality standards form the baseline platform of this high-capacity Wiha 28789 Torque Control Set. Fully matching strict EN ISO 6789, BS EN 26789, and ASME B107.14M parameters, every single serialized handle is bath-tested at 10,000V AC to guarantee 1,000V operating security. When driving a fastener, the specialized internal clutch emits an audible mechanical click the exact microsecond your preset torque limit is reached, sliding freely to stop secondary over-torque strains. The package bundles interchangeable SlimLine blades that thin down by 33% at the shaft collar to slide smoothly into recessed spring terminal blocks, alongside a heavy-duty ClickFix quick-release blade holder to make bit swaps effortless.

Why the Wiha® 28789 Insulated TorqueVario-S® Set Controls the Jobsite:

• Certified 1000V VDE Voltage Defense: Extensively tested to pass strict international IEC 60900 safety guidelines, providing absolute arc-flash protection inside live panel enclosures.
• Audible Slip Clutch Torque Release: Emits a distinct mechanical click and slips the drive automatic when reaching targets, eliminating over-tightening structural cracks.
• 33% Thinner Integrated SlimLine Blades: Protective safety sleeve insulation is molded completely flush against the tool steel to let tips slip into sunken contacts.
• Premium +/- 6% Tolerance Accuracy: Delivers precise mechanical control across intricate assemblies, complete with a Direct-Reading numerical scale window.
• 50% Boosted Back-Turn Disfastening Force: Features an asymmetry clutch that channels extra force to loosen tight, corroded screws easily without altering your torque settings.

Specifications