Features 1、Effective solution for broken heads screw, screw stuck, rusty screw. 2、It can remove some of the common screwdriver can not be disassembled damaged bolts, screws, bolts and hose. 3、The reverse spiral grooves is designed to buckle downward to provides maximum grip, for use with screw extractors to removes broken studs, bolts, socket screws, and fittings. 4、Strong toughness and wear-resistant accurancy thread, quick removal of broken screws, slip screw, rust screw, etc. 5、Portable square heads design, which can be twisted with a winch or adjustable wrench. Specification These extractors will remove most kinds of damaged, stripped, rusted, broken, or stuck screws from any wood or metal surface with relative ease. Features: Effective solution for broken heads screw, screw stuck, rusty screw. It can remove some of the common screwdriver can not be disassembled damaged bolts, screws, bolts and hose. The reverse spiral grooves is designed to buckle downward to provides maximum grip, for use with screw extractors to removes broken studs, bolts, socket screws, and fittings. Strong toughness and wear-resistant accurancy thread, quick removal of broken screws, slip screw, rust screw, etc. Portable square heads design, which can be twisted with a winch or adjustable wrench. Specifications: Color: black Material: chrome vanadium steel Package size: 190 * 100 * 45mm / 7.5 * 3.9 * 1.8in Package weight: 300g / 10.6ounce Packing List: 1 * Set of Damaged Screws Extractors Package List 1 * Set of Damaged Screws Extractors