Features : Good quality material: Made of high quality 45# steel, high hardness and good toughness. Multi use: 31-in-1 design, interchangeable screwdrivers kit is suitable for variety repair, serve your basic work and meet all your need. Portable: Portable screwdriver set with weight & compact design and comes with a plastic storage box for easy carrying and storage. Non-slip handle provides more comfort and convenience. Magnetic screwdriver, easy to pick up screws and prevent screws from losing. Widely application: for home, office, workshop, garage & garden. It can be used to charge computers, telephone, appliances and so on. Specification : Name: Material: 45# Steel Color: As picture shown. Screwdriver handle size: app. 7.9x1.8cm(3.11x0.71in) Trox screwdriver: T3, T4, T5, , T7, T8, T9, T10, T15, T20 Hex screwdriver: H1.5, H2.0, H2.5, H3.0 , H3.5, H4.0 Cross screwdriver: PH000, PH00, PH0, PH1, PH2 Flat screwdriver: 1.5, 2.0, 2.5, 3.0, 3.5 Round needle type: 1.0 Y screwdriver: Y3.0 Five-star screwdriver: 2.0 Triangle driver: Entity triangle 3.0 Others: U2.6 Quantity: 1 set Package includes: 30 x ScrewdriverBits 1 x Drill Holder 1 x Storage Box (Other accessories demo in the picture is not included.) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!