Manual screwdriver Wiha 42399 Single Standard — precision hand screwdriver, insulated handle

Slotted, 4 mm. The Wiha 42399 Single Standard precision hand screwdriver is designed for careful, controlled fastening and loosening of small screws. It combines a long slim shaft, a smooth rotating cap and an ergonomic insulated handle to deliver precise control for delicate tasks in precision mechanics, electronics, model-making and hobby work.

Advantages

Extra-long rotating cap provides optimum feed and enables quick, sensitive turning. The screwdriver handle size concept balances precision and control for accurate torque transfer. Slim handle with a soft grip ensures careful workmanship and controlled power transmission while reducing hand fatigue. Rotating cap is printed with screwdriver symbols to help select the correct profile.

Suitable for

Key specifications

How to use

Choose the slotted 4 mm blade for a matching screw head. Hold the slim handle between fingers and palm, using the rotating cap to guide fast, sensitive turns while applying steady, controlled torque. Use the printed symbol on the cap to confirm the profile before starting. For removal, turn counterclockwise; for fastening, turn clockwise, maintaining gentle pressure to avoid cam-out or damage to the work piece.

Recommendations

Use this precision screwdriver for small screws and delicate assemblies; avoid applying excessive torque beyond hand-tool capability. Keep the blade clean and check compatibility with the screw head to prevent rounding. Store dry to preserve the matt chrome-plated finish.