Description:* Material -- This flexible shaft is made of carbon steel and plastic which make it practical and durable.* Widely used -- Bends,twist and turns to use drill into tight and confined spaces. Suitable for ordinary hand drill and electric drill with perfect performance. Applied to hardware maintenance and repair, including computer chassis, electrical cabinets, furniture, electrical appliances, etc.* Widely compatible -- This extension shaft is for Small wrench, cordless screwdriver, low speed DC hand drill, pneumatic screwdriver, torque drill, electric screwdriver.Features:Connection hex shank drill site size (6.35mm) (1/4) 0.25-inchConnecting parts of the batch Hex size (6.35mm) (1/4) 0.25-inchTotal Size: 150x13mm/5.9 x 0.51-inch(L*Max. Dia.