Dimensions - 10 pieces Extractor Screw Extractor Set. And left hand cobalt drill bit work on sizes - 19/64 inch ,1/4 inch ,3/16 inch ,5/32 inch ,1/8 inch . Spiral screw extractors include 1#, 2#, 3#, 4#, 5#. Impact drive for all kinds of job applications. High-Quality Material: The drill bits and extractor tools are made of high-quality steel material that is durable and rust-resistant, ensuring long-lasting use. Universal Bit holder - with quick-release chuck for Screw Extractor Set and Left Hand Drill Bit set .Allows for quick one-handed bit exchange for both insert and power bits are easily inserted with press-in and self-locking mechanism. Easy to Pick and Carry - The entire screw extractor set is packed in a plastic box for easy storage. Wide Application: This extractor set is suitable for various DIY projects or household repairs. strips off nasty screws in seconds! A must-have tool for , handymen, contractors, construction workers or DIY enthusiasts alike. Color: As Shown Material: carbon steel Package Contents: 10 x drill bits 1 x extractor 1 x plastic box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.