As an upgraded extractor can be directly connected to a wrench without a connection socket. Standard 3/8-inch drive design to let the screw extractor set be used with hand tools, power, or air tools. It is more convenient and fast, satisfying the multi-function. The material of high hardness chrome-molybdenum steel with heat treatment for superior durability. Each surface is precision machined and resistant to corrosion. Unique left-handed spiral design for extra grip and faster tapping. High-visibility size markings on each extractor contains 7/8 inch, 27/32 inch, 13/16 inch, 25/32 inch, 3/4 inch, 23/32 inch, 11/16 inch, 21/32 inch, 5/8 inch, 19/32 inch, 9/16 inch, 17/32 inch, 1/2 inch, 15/32 inch,7/16 inch, 13/32 inch, 3/8 inch, 11/32 inch, 5/16 inch, 9/32 inch, 1/4 inch, 7/32 inch, 3/16 inch, 5/32 inch, 1/8 inch meets all your needs. 25 pcs screw extractor set provides a more efficient extraction of damaged screws, bolts, studs, fittings, threaded pipes, and pins. It's Perfect for use , in the garage, at the construction site, or in your shop. Heavy duty blow molded case keeps all the bolt remover stay organized. Material: Steel colour: Silver Package Contents: 1 set x Bolt Extractor Kit (25 Pcs) 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.