Flat screwdriver for electricians STANLEY FatMax 4x100 mm (model 65-412)

The Flat screwdriver for electricians STANLEY FatMax 4x100 mm (model 65-412) is a hand tool designed for use in electrical installations where a 4 mm flat blade and a 100 mm shaft are required. It is built to engage slotted screw heads in switches, outlets, junction boxes and electrical devices. The screwdriver combines a narrow blade profile for precise engagement with a handle shaped for controlled torque during tightening and loosening operations.

Advantages

This STANLEY FatMax flat screwdriver provides accurate blade fit in slotted screws and reduced cam-out risk during turning. The 100 mm shaft length offers sufficient reach into recessed terminals while keeping control close to the work. The handle design supports a firm grip and directional control, helping to apply the necessary torque without excessive hand strain. Materials and construction are chosen to maintain blade geometry and durability under regular use.

Suitable for

• Tightening and loosening slotted screws in electrical outlets and switches
• Work in junction boxes and control panels with limited access
• Maintenance and repair of household and commercial electrical devices
• Professional electrician tasks and DIY electrical projects requiring precise flat-head engagement

Key specifications

• Blade width: 4 mm
• Shaft length: 100 mm
• Blade type: flat / slotted
• Intended use: electrical fastening work on slotted screws
• Handle: ergonomic design for controlled torque application

How to use

Select the screwdriver when the screw head matches the 4 mm flat blade width. Insert the blade fully into the slotted screw to ensure complete contact between the blade and the screw slot. Apply steady axial pressure and turn the handle to tighten or loosen the screw, keeping the shaft aligned with the screw to prevent slipping. For work inside enclosures, use the 100 mm shaft to reach recessed fasteners while maintaining a stable grip on the handle.

Usage recommendations

For safe electrical work, always disconnect power or confirm circuits are de-energized before using the screwdriver on live installations. Use appropriately insulated tools if working near live conductors. Maintain the blade by keeping it clean and free of burrs; inspect the tip for wear and replace the tool if the blade is deformed to avoid damage to screw heads.