Economical: 10pcs useful tools set includes 5pcs alloy steel screw extractors and 5pcs left-hand drill bits. Sturdy and Durable: Cobalt drill bit sets are made of high quality material, durable to use. Extractor bits easily remove broken screws, studs, bolts and other fittings. Left-hand drill bits are made of cobalt-reinforced high-speed steel for increased durability and longer service life. Professional and Practical: Spiral flutes on screw extractors dig into the screw, increase grip as torque is applied, are excellent for removing bolts, screws, fittings, etc. High Applicability: Cobalt drill bits in different sizes to meet different needs: 5/64, 7/64, 5/32, 1/4, 19/64. Assorted Alloy Extractors: #1, #2, #3, #4, #5. Convenient Storage: With lightweight and durable metal carrying case for organizing and storing. The collection is firm and not easy to fall off. The sizes are clearly labeled, easy to take the drill bit you want. Product Size: 14.6 x 11.3 x 2.8 cm Product Color: Gold