ITEM NAME:4 IN 1 Titanium Screw Extractor Drill Bits Guide Broken Damaged Bolt Remover # Description Specification: Brand new Type: 1#, 2#, 3#, 4# Material: S2 titanium Color: Gold Scope of application: 3-5mm, 4-8mm, 5-10mm, 6-12mm Feature: Fast, convenient, disassemble screws, tacks. And speed can be changed in the opposite direction of rotation of the drill in conjunction. For removing the wood in the head has been broken wood screws, stud in to give a head wood screws drilled, easy to use to take another head screws. Quickly and easily take out broken screws, triangle valves, water pipes, faucets, mechanical broken wires, etc. Package included: 4pcs x Screw Extractor Note: Please allow 1-5mm size errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..4pcs x Screw Extractor. Material: S2 titanium. And speed can be changed in the opposite direction of rotation of the drill in conjunction. For removing the wood in the head has been broken wood screws, stud in to give a head wood screws drilled, easy to use to take another head screws.