characteristic: 8 screw extractors, heavy steel, screw extractors of different sizes, to meet different needs. It can remove some of the common screwdriver can not be disassembled damaged bolts, screws, bolts and pipes. Reverse thread bits easily remove screws, bolts, studs, and threaded pipe fittings. Application Will remove most kinds of damaged, stripped, rusted, broken, or stuck screws from any wood or metal surface with relative ease. The damaged screw extractor kit is made of steel and tempered twice to increase hardness and durability. describe: Name: broken screw extractor set Model: 1#, 2#, 3#, 4#, 5#, 6#, 7#, 8# Material: steel colour: Silver+Black Package Contents: 1 x Broken screw extractor set 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.