【HIGH-PERFORMANCE BOLT EXTRACTORS】: Removing broken or damaged screws, bolts and fasteners without any effort. The extractor can easily and quickly remove broken or rusty screws, bolts and studs 【 【CONVENIENT BROKEN SCREW EXTRACTOR】: Suitable for removing all available terms such as bolts, screws and studs which diameter ranges from 4mm to 25mm. Simple and reliable in general applications 【PORTABLE SCREW DRILL EXTRACTOR KIT】: Comes in a storage box with 12 pieces: 6 pieces for screw extractors and 6 pieces for drills . Very convenient and practical to set up all these tools and carry them everywhere 【HIGH QUALITY SCREW EXTRACTOR SET】: This broken screw extractor set is made of high quality material , durable enough for long term use. These extractors will remove most types of damaged, stripped, rusted, broken or stuck screws