Wera 7440/41/42 Kraftform Torque Screwdriver Set, 0.3-6.0Nm, 3x Torque Screwdrivers and 24x Bits, Plastic Carrying Case

Overview

Terminal screws on inverters, charge controllers, and bus bars need correct torque. The Wera 7440/41/42 Kraftform set covers 0.3-6.0Nm with three dedicated torque screwdrivers and 24 bits in a plastic carrying case.

Key benefits

• Each driver covers its own range, so you are never working at the extreme end of one tool.
• Measurement accuracy of ±6% to DIN EN ISO 6789, with an audible and physical signal at the set torque.
• Unlimited torque in reverse lets you loosen seized screws without switching tools.
• Rapidaptor chuck allows one-handed bit changes.

Key features

• 7440 driver: 0.3–1.2Nm
• 7441 driver: 1.2–3.0Nm
• 7442 pistol-handle driver: 3.0–6.0Nm
• 24 bits: TORX (T6-T30), TORX Plus (6 IP-30 IP), and Hex-Plus (2-6mm), all 25mm long with 1/4-inch hex shank
• Stable plastic case with dedicated bit organization

Ideal use

Well suited to inverter and charge controller wiring, battery system assembly, and solar panel grounding and mounting hardware where torque specs apply.

What is included

• 7440 torque screwdriver
• 7441 torque screwdriver
• 7442 pistol-handle torque screwdriver
• 24 bits
• Plastic carrying case

Key specifications

Model / SKU

5074739001

Brand

Wera

Category

Accessories

From the manufacturer

Wera 7440/41/42 Kraftform Torque Screwdriver Set 0.3-6.0Nm Overview When precision tightening matters, the Wera 7440/41/42 Kraftform Torque Screwdriver Set delivers accuracy, versatility, and durability in a single, thoughtfully organized 27-piece kit. This professional-grade adjustable torque screwdriver set covers the torque range of 0.3Nm to 6.0Nm across three dedicated drivers, giving installers and technicians the right tool for every fastener. Whether you’re securing terminal blocks, mounting inverter hardware, or torquing battery connectors to spec, this set is built to reliably provide the correct torque the first time. Key Features of the Wera 7440/41/42 Kraftform Torque Screwdriver Set Three-Driver Coverage Across the Full Range: The set includes three distinct torque drivers: the 7440 (0.3–1.2Nm), 7441 (1.2–3.0Nm), and the 7442 pistol-handle driver (3.0–6.0Nm). This way, you’re never stretching the low end or overloading the high end of a single tool. Each driver is purpose-matched to its torque range for maximum accuracy. ±6% Measurement Accuracy to DIN EN ISO 6789: These aren’t estimated torque tools. Each adjustable torque screwdriver in this set meets the rigorous DIN EN ISO 6789 international standard for torque tools, with a measurement accuracy of ±6%. An audible and physical signal alerts you when you reach the pre-set torque value, protecting sensitive components from over-tightening. Rapidaptor Quick-Release Bit Chuck: Wera’s Rapidaptor technology enables one-handed bit changes without moving the sleeve. The bit seats automatically and securely locks when it contacts the fastener. To remove, simply push the sleeve forward. The spring mechanism lifts the bit off the magnet for easy bit extraction. Unlimited Torque for Loosening Seized Fasteners: Unlike fixed-torque tools, this adjustable torque screwdriver set allows unlimited torque in reverse, so you can break loose seized screws without switching tools or potentially damaging the mechanism. Comprehensive Bit Assortment: The set ships with 24 bits including TORX (T6-T30), TORX Plus (6 IP-30 IP), and Hex-Plus (2-6mm metric) profiles, all 25mm long with 1/4″ hex shank compatibility. The bits come in a high-quality, stable plastic case with dedicated bit organization. Ideal Applications for Adjustable Torque Screwdrivers An adjustable torque screwdriver is essential to prevent electrical hazards caused by over-torquing or under-torquing. Use the Wera 7440/41/42 in a broad range of precision work environments: Solar Panel Installation: Grounding lugs, rail splice connectors, and frame mounting hardware all require specific torque values to meet manufacturer specs and electrical code requirements. Inverter and Charge Controller Wiring: Terminal connections on Victron, Schneider, SMA, and similar inverters demand careful torque control to ensure secure, code-compliant connections without cracking terminal blocks or stripping screw threads. Battery System Assembly: Bus bar connections, BMS terminals, and cell interconnects all benefit from repeatable, calibrated torquing to maintain safe, long-term conductivity. Electrical Panel Work: Breaker terminals, neutral bar lugs, and DIN rail hardware require a calibrated torque driver to protect both the equipment and the installer. HVAC and Controls: Terminal strip and sensor wiring in control panels require the low-end precision of the 7440’s 0.3-1.2Nm range. Electronics and Instrumentation: Small fasteners and sensitive housing used in these environments require the precision of the low-end torque drivers included in this set. Frequently Asked Questions About the Wera 7440/41/42 Torque Screwdriver Set What is the full torque range covered by this set? This set covers 0.3 to 6.0Nm across three drivers: the 7440 (0.3-1.2Nm), the 7441 (1.2-3.0Nm), and the 7442 pistol handle (3.0-6.0Nm). How accurate are these torque drivers? Each torque driver in this set is accurate to ±6% in accordance with DIN EN ISO 6789, which is t

Warranty terms mentioned in this description are the manufacturer’s. Our own coverage is the 30-day limited warranty.

Before you order

We confirm compatibility, installation requirements, and delivery details with you during order review, before any payment. Home electrical work may require a qualified installer.

Ask our team if you need help matching torque values for your equipment to this Wera set. Message our team on WhatsApp.