About This Complete 90-Piece Professional Kit : The kit contains: 9 precision screwdrivers, 14 standard screwdrivers, 64 S2 bits (in 4mm & 1/4” sizes), 2 extension bars (4in & 7in), and 1 large magnetizer/demagnetizer Premium S2 Alloy Steel : Screwdriver shafts are made of S2 alloy steel with a hardness of ≥58 HRC. All bits are also S2 steel, and the tips are magnetized to securely hold screws Extensive Bit Range for Versatile Use : Offers a wide range of bits including Phillips (PH000 to PH3), Torx (T5 to T40), Slotted, and Hex sizes, suitable for tasks from precision electronics repair to furniture assembly Ergonomic Handle & Portable Storage : Features ergonomic green/black handles. All tools are organized in a heavy-duty blow mold case with dual carry handles Precision Fit & Integrated Solution : Precision-machined bits ensure a tight fit to prevent screw stripping. The integrated all-in-one case provides a complete, portable professional solution Overview Brand : GRENPRO Number of Items : 90 Head Style : Phillips, Slotted, Torx, Hex, Pozidriv, Tri-Wing Material : Alloy Steel Color : Black & Green