EASY REMOVAL It is more convenient and easy to remove the broken screw from the damaged part by using the left bit which coordinates with the screw extractor. The spiral groove on the screw extractor can reach deep into the screw to increase gripping strength to remove studs, screws and bolts around the house, garage or your work project. p> HIGH QUALITY CARBIDE MATERIAL The drill on the left is made of HSS M2. Compared with ordinary high speed steel, M2 material can extend service life, improve wear resistance, and clear chip removal. HSS is harder and stronger than other materials. UNIQUE DESIGN The 118 angle makes it easier to cut into the workpiece with a low axial resistance. This design can not only increase the length of the tip work, but also decrease the nominal thickness of the cutting layer, which improves heat dissipation and durability with better cutting effect. CONVENIENT ORGANIZATION AND STORAGE Come with an index case, convenient to use and carry. SET INCLUDING 5 alloy steel screw extractors and 5 HSS M2 left hand drill bits. Screw extractor includes 1, 2, 3, 4, 5. Left hand drill pattern includes 5/64", 7/64", 5/32", 1/4", 19/64".