11PCS SCREW EXTRACTOR SET - Extractor kit includes 5 pcs left-handed drill bits, 5 pcs spiral screw set and a quick adapter. The bottom of the drill bits and the extractors have a unified 1/4 size design can be used more conveniently with an adapter to connect hand tools or electric tools, improving the efficiency of handling most maintenance work. PROVIDE REMOVE SPACE - 135°angle makes bits easier to cut into the workpiece and has less axial resistance providing an effective removal space without damaging other working areas. Left-handed flute design runs the impact wrench in reverse also improves the effect of spinning broken bolts out. Each left-handed drill bit is of high-speed steel material with titanium coating drill bits enhance hardness and wear resistance. EXTRACT BROKEN SCREW - 5 Pc spiral screw extractors with spiral flutes embed themselves to increase grip as resistance increases, easily spin embedded broken bolts and damaged screws out based on drill hole, help out of tough spots. Also providing extra needs can reach deeper places for bolts and screws removed. Each made of premium Chromium-molybdenum steel material is sturdy. EASY TO US - A quick change adapter is added to the kit without worry about disassembling the drill bit and extractor back from hand tools or electrician tools. Each drill bit/extractor and adapter are used in combination through magnetic suction to improve efficiency at work. The palm-sized storage box is easy to carry and increases the number of daily uses. WIDE APPLICATION & RELIABLE - Ingenious drill bit with extractor combination meets most mechanical maintenance, automotive, home decor or craft production repair needs. Coobeast tools have quality assurance, feel free to contact us if there are any problems with the product. We provide you with service for the first time. Coobeast 11Pcs Screw Extractor Set, Left Handed Drill Bit and Screw Extractor Kit Easy to Remove Stripped Broken Damaged Screw Bolt and Nut Out, Reverse Drill Bit Extractor Set with Sturdy Case