Screwdriver Knipex KN 98 20 40 SL — slotted 4.0 mm, multi-component handle

Knipex KN 98 20 40 SL is a slotted screwdriver with a 4.0 mm blade and a multi-component handle designed for manual tightening and loosening of flat-head fasteners. The tool is intended for tasks that require controlled torque and a comfortable grip during repetitive operations. Its design emphasizes precise tip fit and stable shaft alignment to reduce slippage and wear on screw heads.

Advantages

The multi-component handle combines a hard core for torque transfer with softer outer zones for improved grip and reduced hand fatigue. The precisely machined slotted tip ensures consistent contact with flat-head fasteners and minimizes cam-out. The hardened and corrosion-resistant shaft offers long service life under regular workshop and field conditions. The compact blade diameter and balanced weight make the screwdriver suitable for close-up work in confined spaces.

Suitable for

• Electrical installation and equipment maintenance
• General assembly and disassembly of devices with flat-head screws
• Routine maintenance tasks in workshops and production lines
• Field service and repair operations requiring controlled torque

Key specifications

• Tip type: slotted (flat) tip
• Blade width: 4.0 mm
• Handle: multi-component ergonomic handle for improved grip
• Shaft material: hardened steel with corrosion-resistant finish
• Tool use: manual screwdriver for flat-head fasteners

How to use

Select the slotted screwdriver with a 4.0 mm blade that best matches the width of the screw slot. Place the tip fully into the screw head slot to ensure proper engagement, then apply steady rotational force while maintaining axial pressure to prevent the tip from slipping out. Use controlled torque rather than excessive force to avoid damage to the screw or tool. Clean the tip regularly and store the screwdriver in a dry place to maintain the corrosion-resistant finish.

Usage recommendations

For best results, use the screwdriver with screws that match the 4.0 mm blade width, avoid using the tool on damaged or rounded screw heads, and do not use the screwdriver as a chisel or pry bar. For electrical work, verify that the screwdriver meets any local insulation or safety requirements before use.