This versatile screwdriver set is designed to assist you in resolving various tasks in your daily life or work. It includes a selection of different bits such as slotted bits, cross bits, and more. The adjustable interface lets you press down to modify the bit length and switch bits easily. If you are in search of a reliable tool, this one is worth a try! Specifications: Material: chrome-vanadium steel Type: 13pcs, 17pcs (optional) 13pcs bits size: U2.3, T5, T6, T7, Y0, 2.0, 3.0, T8, T10, T15, 3.0, 2.3 17pcs bits size: U2.3, U2.6, T10, T15, Y0, Y1, 4.0, 5.0, T20, T25, 4.0 (cross), 5.0 (cross), 2.3 (triangles), 2.6 (triangles), inner cross bit, new three points bit 13PCS package size: 150 * 104 * 30mm / 5.9 * 4.1 * 1.2in 17PCS package size: 193 * 130 * 30mm / 7.6 * 5.1 * 1.2in Package weight: 13PCS: 110g / 3.9ounce 17PCS: 214g / 7.5ounce 13PCS Packing List: 1 * Screwdriver 12 * Bits OR 17PCS Packing List: 1 * Screwdriver 16 * Bits