Specification: Material: Plastic + metal Full length: 295mm Flexible shaft dimensions: Hex shank: 6.35mm (1/4\") Inner hexagon head: 6.35mm (1/4\") Color: Black Feature: This Flexible shaft can be used for general formula hand drill chuck, it can also be used for electric screwdriver screwdriver. Flexible shaft head can be mounted hexagonal shank (1/4 handle) the first batch, mainly used in computer chassis, electrical cabinets, furniture, electrical appliances and other narrow space screwdriver can not work in an environment operations . Package Included: 1 x Flexible Shaft Drill Bit Holder