Description: High Quality Screw Extractor: Our screw extractor kit is made of durable high hardened steel. Wide Compatibility: Can be widely used in household, telecommunication, automotive or machinery repair work. Suitable for general sizes and all kinds of broken bits. Tips for Use: It is best to use electric hand drill. Must drill a hole first when the break screw surface is smooth. Otherwise the drill bit will slip. Must be vertical and low speed when drilling, reverse use this bit, drill the first hole deeper will easier to take out. Easy to Use: Use the drill bit to drill a hole in broken screws. Change to use the extract bit with the same size. Reverse use the drill and take out the broken bit. Modern Tool: Keep this set in your toolbox to get the damaged screw out and your project back on track. Highly suitable for various machinery repair work. Specification: 3105 4pcs: Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.8x51mm/0.31x2.01in 3103 4pcs: Size1:Approx.6x50mm/0.24x2.01in;Size2:Approx.6x51mm/0.24x2.01in; Size3:Approx.8x51mm/0.31x2.01in 3105D 4pcs: Size1:Approx.6x50mm/0.24x2.01in;Size2:Approx.6x51mm/0.24x2.01in; Size3:Approx.9x51mm/0.35x2.01in 3105C 4pcs: Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.9x51mm/0.35x2.01in 3104 4pcs: Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.9x51mm/0.35x2.01in 3106A 4pcs: Size1:Approx.6x50mm/0.24x2.01in;Size2:Approx.6x51mm/0.24x2.01in; Size3:Approx.8x51mm/0.31x2.01in 3106 4pcs: Size1:Size1:Approx.6x50mm/0.24x2.01in;Size2:Approx.6x51mm/0.24x2.01in; Size3:Approx.8x51mm/0.31x2.01in 3184 5pcs : Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.9x51mm/0.35x2.01in 3184A 5pcs: : Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.9x51mm/0.35x2.01in 3185 6pcs: : Size1:Approx.6x51mm/0.24x2.01in; Size2:Approx.9x51mm/0.35x2.01in Package Includes:(6 Pack) 4/5/6 Pieces Screw Extractor Bits(Optional)