High Quality Hardware Made of high quality stainless steel and titanium which is precision cut and molded for an extremely strong hex socket head that is resistant to stripping and breaking. The handle is made of high quality aluminum with a non-slip outer layer for supreme grip. These professional high-end tools will make you feel like a real Formula 1 mechanic. The set includes 4 professional hexagon socket screwdrivers in 4 different sizes. The aluminum handle with soft non-slip surface has a length of 90mm/3.5 inch and a diameter of 18mm. Total length 175mm 1x1.5mm, 1x2mm, 1x2.5mm, 1x3mm. Each handle is marked with a clear size marking for easy identification and use. Multi-functional use Can be used in a wide variety of uses. Mainly used in professional RC racing world for disassembling and reassembling model DJI drones, RC helicopter, RC quadcopter, RC cars, RC boat, Multi-axis FPV racing drone, robot, etc. The winner on a Track is often the one with the best equipment. It is not by saving on your tools that you will become a winner. High Quality Product by MMOBIELAll our products are tested before shipment. Product in stock