The DEWALT DWMT45184 is a professional-grade comprehensive mechanic tool set from the long-established American tool brand DEWALT, comprising a carefully selected 184 pieces. Its standout feature is the beautiful, highly corrosion-resistant black chrome polish finish on the tools-strong against rust and able to maintain its quality over the long term even in demanding garage environments. Led by a high-performance 72-tooth ratchet handle (5-degree swing arc) that turns fasteners comfortably even in tight spaces, the lineup covers a wide range from automobile and motorcycle maintenance to crafting and DIY. Everything is stored in an extremely rugged dedicated hard case with metal latches, convenient for carrying. W 49.0 × D 36.5 × H 10.0 cm. Main Material: Alloy steel (metal). Tool Finish: Polished black chrome design (excellent corrosion resistance). Grip: Bi-material grip (non-slip, comfortable hold). Drive Sizes: 1/4″, 3/8″, 1/2 (covers the three main sizes). Ratchet Teeth: 72-tooth (5-degree swing arc). Standard: Both Metric and SAE (inch) compatible. Safety Standard: Meets or exceeds ASME (American Society of Mechanical Engineers) standards. Main Contents (184 pieces). Ratchet handles (72-tooth, in each drive size). Sockets (84 total): Standard hex sockets, deep hex sockets, spark plug sockets. Wrenches (11 total): Combination wrenches (box-end/open-end). Drivers & bits: Bi-material grip bit driver, nut driver bits, specialty drive bits. Accessories: Extension bars, case (with metal latches).