Description Made of chrome vanadium steel, high hardness, anti-rust, strong and durable The diameters of the drills and the recommended extraction diameters of the broken screws are engraved on the case Extractors and drills with great gripping force Ideal for removing damaged, rusted or bare screws, studs, bolts, closure, metal water faucet and water tube, etc. Drill bits can also be used to drill holes on wood, metal, plastic, brick and wall, etc. Product description Color: 11pcs SPECIFICATION: Extractor Diameter: 1 for 1/8 - 1/4 (3-6mm) 2 for 1/4 - 5/16 (6-8mm) 3 for 5/16 - 7/16 (8-11mm) 4 for 7/16 - 9/16 (11-14mm) 5 for 9/16 - 3/4 (14-18mm) Drill Diameter: 1: 5/64 (2.0mm) 2: 7/64 (3.0mm) 3: 5/32 (4.0mm) 4: 1/4 (6.5mm) 5: 19/64 (7.5mm) Package Include: 5 x Drill bits 5 x Extractor 1 x Faucet Fixing 1 x Storage Box