Feature: Material: The Flexible extension screwdriver is made of high quality plastic material,steel alloy hexagon head,high precision manufacturing. Functions: It can be used for ordinary hand drill and electric drill with perfect performance.Bends,twist and turns to use drill into tight and confined spaces. Connector Size: Connection hex shank drill site size 6.35mm(1/4),connecting parts of Inner hexagon head size 6.35mm(1/4). Applications: Mainly used in computer chassis, electrical cabinets, furniture, electrical appliances and other narrow spaces that screwdriver can not work in an normal operations. Safety: Flexible shield protects your hands while the internal shaft rotates freely. Specification: Shape: snake Material:Plactic +Steel System: metric system Flexible shaft dimensions: Hex shank: 6.35mm (1/4") Inner hexagon head: 6.35mm (1/4") Length: 290mm/11.6inch Package Weight: 80 g Package Included: 1* flexible extension screwdriver