Elitexion 9 Pc Torx Star 5 Point, Security Tamper Proof Bit Set With Belt Clip (T10, T15, T20, T25, T27, T30, T40) Constructed with high grade material for long lasting use. The hole in the center in each bit will cause it to be tamper resistant. Designed to prevent cam-out the 5-love 1/4" shank hex bit clicks onto most standard sockets, screwdrivers, drill, and power drill attachment. Ideal for automotive repair, trucks cars, engine, motorcycle, computer, cable box, toys, appliance, and consumer electronics. SIZES: T10- 2.74 mm, T15- 3.27 mm, T20- 3.86 mm, T25- 4.43 mm, T27- 4.99 mm, T30- 5.52 mm, T40- 6.65 mm.