Features: Brand new and high quality Easily remove stubborn screws with this 15piece screw extractor set, featuring a ranges of extractor and left hand drill bit. 15PCS Upgrades Screw Extractor Set Screw Extractor: 1#, 1#, 2#, 2#, 3#, 4#, 5#. Left Hand Cobalts Drill Bit: 1/8", 1/8", 5/32", 5/32", 3/16", 1/4", 19/64".1/4" Adapter for electric drill-6cm. Besides, there is 1/4" adapter for electric drill-6cm to extend the drill interfaces. Durability - Left hand drill bit made with impact-resistant 6542 steel, screw extractor made with high-quality crmo steel, which increases durability and service life. It's built to last and is designed to be hard, and easier to drill, greatly increasing service life. Also, comes with a storage tool box to ensure you will not lose any one of them. more, you can take it anywhere with you. Easy to Use Simple to remove all stuck screws or bolts in a few seconds. Step 1 to choose a drill bit smaller than the damaged screw, Step two to use the same size extractor to take out reversely use your electric hand drills in low speed avoid getting hurt. Wide Applications - Whether you need to remove rusted, stripped, or damaged bolts and Studs, or simply want to disassemble fasteners, this set is an excellent choice. It includes both screw extractor and left-hand drill bit, making it easy to tackle even the toughest tasks. Specifications: Material: Titanium plated stainless steel+stainless steel Package Includes: 15Pcs Damaged Screw Extractor note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.