Screw extractor set wiha 03988 — 5 pieces, for removing broken and rounded screws

Wiha Screw Extractor Set 03988 includes five specially shaped extractors designed to remove broken, seized or rounded screws. Each extractor has a reverse-thread profile that bites into damaged screw heads, allowing controlled removal without significantly enlarging the fastener hole. The set covers a range of common screw diameters and is intended for workshop, maintenance and repair tasks where stripped or sheared screws prevent normal disassembly.

Advantages

The extractor set offers durable hardened steel construction for reliable bite and extended service life. Its tapered geometry and reverse threads provide progressive grip on damaged screws, reducing the risk of further rounding. Compact selection of five sizes provides flexibility for different screw diameters while keeping the kit small and easy to store. The design minimizes damage to surrounding material and helps speed up disassembly and repair operations.

Suitable for

• Removing broken, rounded or seized screws in mechanical assemblies
• Maintenance and repair of household appliances and electronic devices
• Automotive and motorcycle repair where fasteners are corroded or sheared
• Workshop and professional service tasks that require extraction of stripped fasteners

Key specifications

• Set composition: 5 extractors with graduated sizes to cover a range of screw diameters
• Material: hardened steel for improved wear resistance and strength
• Thread profile: reverse (left-hand) tapered threads for secure engagement
• Finish: corrosion-resistant surface treatment to extend tool life
• Storage: compact kit suitable for toolboxes and service kits

How to use

Choose the extractor that matches the damaged screw diameter. Create a small pilot hole in the center of the damaged screw if necessary to ensure the extractor seats correctly. Insert the extractor into the pilot hole and turn counterclockwise with an appropriate driver or wrench so the reverse threads bite into the screw. Apply steady torque until the extractor grips and the screw begins to turn; continue turning to remove the screw. If additional leverage is required, use a T-handle or adjustable wrench compatible with the extractor's drive end. Clean the hole and inspect the surrounding material after removal.

Usage recommendations

Use appropriate eye protection and hand tools rated for the required torque. Drill pilot holes with a correctly sized bit to avoid excessive material removal. Apply penetrating oil to corroded fasteners before extraction to improve chances of success. If the screw is deeply embedded or the surrounding material is fragile, consider professional assistance to avoid further damage.