Made of carbon steel, tempered twice to improve hardness and durability. Suitable for wood screws and mechanical screws, as well as flat head screws, hexagon screws or painted screws. Screw extractors with different sizes can meet different requirements and have long service life. It can remove some damaged bolts, screws, bolts and pipes that ordinary screwdrivers cannot remove. It can more easily remove any damaged, flaked, rusted or broken screws on any wood or metal . Conveniently and quickly remove all kinds of broken bolts and screws. Name:broken screw extractor Colour:Black Material:steel Size:3-6mm, 6-8mm, 8-11mm, 11-14mm, 14-28mm Package Contents: 5 * Broken screw extractor 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.