It adopts authentic carbon steel material with mirror surface , durable and corrosion resistant. Quick release reversible ratchet , turn right to lock and turn left to disassemble. It can be used for removing throttle, seat chair, car door lock, , and remove screws and nuts of various shapes. Comes with a sturdy tool case for storing and carrying. Suitable for the repairing and maintenance of car, motorcycle and . Product Name: Wrench Socket Combination 40-Piece Set Screw port size: the big one is 16mm and the small one is 4mm Product features: Made of authentic carbon steel with mirror surface treatment. This product is suitable for vehicles, home use, machine repair, auto repair, etc... Suitable for removing throttle valves, seats and chairs, door locks, fenders; suitable for car interior decoration. Suitable for motorcycles, bicycle maintenance, suitable for removing screws and nuts of various shapes! Weight: 1kg color: gray Material: plastic|+iron Quantity: 1set Packing list: 1*wrench socket combination 40 pieces set Only the above package contents are included, other products are not included. Note: Reflection of light and different monitors may cause the item's color to be slightly different from the actual item. Measurements allow +/- 1-3 cm.