Tonsiki 12pcs 1/4 Inch 50mm T5-T40 Torx Magnetic Plum Batch Head Screwdriver Bit [Excellent Material]Magnetic torx security head 50mm screwdriver bar.S2 high quality steel, this batch of head using S2 high quality steel, batch head surface for steel material color,from inside to outside are the same.Good material does not need to make the surface decoration through the exterior decoration, the quality of the batch is to look at the intrinsic material. [Powerful Function]Strong magnetic,can suck the screws easily when used it. [Wide Using Application]Can be used for manual electric screwdriver, screwdriver, drill, air and other tools. [Exquisite Workmanship]Home screw use PH2 for major, large electrical use PH1, PH2 for major, small electronic appliances use PH0 , PH1 for major. Precision instruments use PH0, PH00 for major. (PH1 is pointeder than PH2 , PH0 is the most pointed) [12 in 1 Professional Size]Professional multi size,include T5,T6,T7, T8, T9, T10, T15,T20, T25, T27,T30, T40,hexagonal handle on the edge of 6.35mm.50mm length. Use different sizes to screw, will damage screwdriver and the screw! Using the correct screwdriver bar, pay the less effort, and can easily unscrew the screws!