Feature: The whole product is made of chromium vanadium steel, which has high hardness and durability. The head of screwdriver can be disassembled and used flexibly. The handle is treated with anti-slip process and comfortable to hold. This product is very suitable for handling stubborn screw. Scope of application: outdoor construction, interior decoration, engineering construction, mechanical maintenance, suitable for extract of various screws. Specification: Material: Chromium Vanadium Alloy Type of bit: Slotted(8*36mm, 8*70mm), Cross(8*36mm, 8*70mm), Hex(6*36mm, 8*36mm) Weight: 1112g / 39.2oz Connect port size: 12.5mm Handle length: 16cm / 6.3in Package list: 4 * Slotted bit(8*36mm) 1 * Slotted bit(8*70mm) 4 * Cross bit(8*36mm) 1 * Cross bit(8*70mm) 1 * Hex bit(6*36mm) 1 * Hex bit(8*36mm) 1 * Screwdriver handle