This is a very useful tool. Using CRV steel material, quenching and hardening make the product life longer. The screwdriver bit adopts precisions manufacturing technology, and the outer box is firmly sealed to better protects the bit from moisture and oxidation. The handle of the stab wheel device can freely choose the twisting direction, various combinations, no need to repeat purchase, saving space and money. Come on and try it. Features: Using CRV steel material, quenching and hardening make the product life longer and safer to use. The screwdriver bit adopts precisions manufacturing technology and has the characteristics of high precisions. The outer box is tightly sealed to better protects the-bits from moisture and oxidation. The handle of the ratchet device can freely choose the direction of twisting. When the it turns to the right, the right direction of the bit is locked, and the left side can be turned, suitable for screwing in, while the ratchet is adjusted to the left, the left direction of the bit is locked, and the right side can be drilled. Suitable for remove the screw out. Diverse combinations, no need to repeat purchase, saving space and money. Specifications: Material: CRV steel Model: 2880B Bit number: 22 Bit type: 2.3, H3, H4, H5, H6, Pz2, Pz3, Y2, Y3, U4.0, U6.0, T10, T15, T25, T30, PH0, PH1, PH2, 3.0, 5.0, 6.0 Number of sockets: 10 pcs Bit length: 25mm / 1.0in Bit diameter: 6.35mm / 0.3in Bit hardness: 48~52HRC Extension rod: 135mm / 5.3in Extension shaft: 60mm / 2.4in Ratchet handle-1:130mm / 5.1in Ratchet handle-2: 135mm / 5.3in Package size: 165 * 95 * 45mm / 6.5 * 3.7 * 1.8in Package weight: 752.5g / 1.7lb Packing List: 22 * Bit 1 * Sleeve Joint 1 * Extension Rod 1 * Universal Rod 1 * Wind Hook Screwdriver 10 * Sleeve 2 * Ratchet Handle