Sealey Square Type Screw Extractor Set 7pc Features: Manufactured from high grade heat treated alloy steel. Chemically blackened finish for resistance to corrosion. Square section aids removal of extractor from screws. Supplied in storage tray. Technical Details: • Manufactured from high grade heat treated alloy steel. • Chemically blackened finish for resistance to corrosion. • Square section aids removal of extractor from screws. • Supplied in storage tray. • Lifetime guarantee*. • Model No. AK720 • Model No. AK720 Additional Information: • Manufactured from high grade heat treated alloy steel. • Chemically blackened finish for resistance to corrosion. • Square section aids removal of extractor from screws. • Supplied in storage tray. • Lifetime guarantee*.