C k precision screwdriver hexagon set of 7 ck tools t4874x ergonomically designed handles with hollow rotating cap for ease of use and precise control blades manufactured from premium quality chrome vanadium molybdenum steel for strength tips accurately machined for the ultimate screw fit contains hex 0 7x50 0 9x50 1 3x50 1 5x50 2x50 2 5x60 3x60ck tools t4874x precision screwdriver hexagon set of 7