Screw extractor RENNSTEIG 2-cut for right and left threads size 4 (model 8218640004)

Screw extractor RENNSTEIG 2-cut for right and left threads size 4 is a precision tool designed to remove broken, seized or damaged screws and studs without enlarging the mounting hole. The two-cut profile provides positive engagement with both right- and left-hand threads, while the size 4 geometry is optimized for medium-small fasteners commonly found in automotive, workshop and maintenance environments. The hardened and ground cutting surfaces ensure repeatable grip and controlled extraction torque.

Advantages

The two-cut design allows the extractor to bite reliably into damaged fasteners regardless of thread direction. Precision ground cutting edges minimize slippage and reduce the risk of further thread damage. The tool is heat-treated to provide durability and wear resistance suitable for repeated use. Its compact size and calibrated profile make it appropriate for confined spaces and for extracting fasteners without reaming or enlarging the original hole.

Suitable for

• Removing broken or seized screws and studs with right-hand threads
• Removing broken or seized screws and studs with left-hand threads
• Automotive repair and engine maintenance tasks
• General workshop and maintenance where hole integrity must be preserved

Key specifications

• Type: two-cut screw extractor for both thread directions
• Size: 4 (suitable for medium-small fasteners)
• Cutting finish: precision ground profile for secure engagement
• Material treatment: hardened for wear resistance and durability
• Application environment: workshop, automotive, maintenance

How to use

Center the extractor on the fractured fastener and apply steady rotational force in the direction that matches the original thread orientation; the two-cut profile will engage the damaged material and enable controlled extraction. Use an appropriate driver or tap wrench that fits the extractor shank, start with light torque to seat the cutting edges, then increase force as engagement is confirmed. If the fastener is heavily corroded, apply penetrating lubricant and allow time to soak before attempting extraction. Work carefully to avoid applying excessive force that could damage surrounding components.

Usage recommendations

Use the size 4 extractor for medium-small screws and studs. For best results, ensure the tool is used with the correct rotary accessory and apply penetrating oil to stubborn fasteners; inspect the extractor before use and replace if cutting edges show significant wear.