Professional screw extractor set for commercial or occasional use 1/2in drive impact screw extractor set Multi spline extractors to remove broken studs, pipes, set screws, grease fittings etc... This kit allows you to extract bolts which are corroded or seized and need to be removed without damaging the casing or thread Deep screw extractors for access in restricted hard to reach areas 1/2in drive so will fit any 1/2in drive ratchets, extensions, power bars etc... Impacted bits so suitable for use with high torque tools such as impact guns Manufactured from CR-mo HRC 48-50 steel for maximum strength and durability 7pc set ranges in sizes from 3mm – 12mm in diameter Will easily bite into and grip the softer bolts Longer flutes provide easier extractor starting Left hand spiral design for extra gripping power SET INCLUDES THE FOLLOWING 1. 3mm extractor for extracting fixings 3-5mm in diameter 2. 4mm extractor for extracting fixings 4-6mm in diameter 3. 5mm extractor for extracting fixings 5-8mm in diameter 4. 6mm extractor for extracting fixings 6-9mm in diameter 5. 8mm extractor for extracting fixings 8-11mm in diameter 6. 10mm extractor for extracting fixings 10-13mm in diameter 7. 12mm extractor for extracting fixings 12-15mm in diameter Comes in a blow molded case for easy storage and transportation SIMPLE TO USE 1. Drill a hole into the fastener 2. Choose a suitable bolt extractor and insert into the hole 3. Use a ratchet or spanner to turn the bolt extractor anticlockwise for easy and effective removal of broken items