If you are looking for a set of efficient and reliable screwdriver bits、 this one is exactly what you are looking for. This 100 in 1 screwdriver set is very useful and practical.Features:An essential tool for home or industrial using.Sand blasting in surface、 which is rustproof and good looking.Come in with a good quality handy red case which holds bits in place.Most of the bits are marked on the side with their size、 which is very convenient.It includes 100 types of bits and sockets in one set、 which would meet your different needs.Chrome-vanadium steel screwdriver bits with heat treatment、 which are in high hardness and good toughness.Specifications:Material: Chrome-vanadium steelSurface Treatment: Sand blastingPackage Weight: Approx. 681g / 24.03ozPackage Size: Approx. 19.5 * 13.8 * 3.8cm / 7.68 * 5.43 * 1.50inScrewdriver Bits Model:1 * 60mm Magnetic Bit Holder1 * Hook Driver Bit1 * 50mm Socket Adaptor1 * 1/4"x1/4" Bit Adaptor1 * 1/4"x1/4" Socket Adaptor3 * Spline: M5、 M6、 M83 * Cluth Bits: 1、 2、 33 * Torg: 6、 8、 104 * Robertson: S0、 S1、 S2、 S34 * Spanner: 4、 6、 8、 104 * Tri-wing: 1、 2、 3、 48 * Phillips: PH0、 PH1、 PH2*5、 PH38 * Pozi driver: PZ0、 PZ1、 PZ2*5、 PH39 * Slotted: 3、 4、 4.5、 5、 5.5、 6、 6.5、 7、 8mm9 * Hex: 1.5、 2、 2.5、 3、 4、 5、 5.5、 6、 8mm9 * Torx: T8、 T10、 T15、 T20、 T25、 T27、 T30、 T35、 T409 * Temper Torx: T8、 T10、 T15、 T20、 T25、 T27、 T30、 T35、 T4010 * Hex: 1/16、 5/64、 3/32、 7/64、 1/8、 9/64、 5/32、 3/16、 7/32、 1/412 * Temper Hex: 2、 2.5、 3、 4、 5、 6mm & 5/64、 3/32、 7/64、 1/8、 9/64、 5/32Package List:1 * Box of Bits