80/120/140mm 1/4 Inch Head Batch Screwdriver Extension Hex Chuck Quick Release Magnetic Chuck Bit Driving Guide Drill Bit Feature:1.(1/4 inch 6.35mm hexagon head international connector, suitable for most impact drivers, drill bits and electric screwdrivers, etc.2. There is no magnet in the inner hole of the drill bit, which can attract the magnetic head, fix the screws and bolts in the right position, and it is not easy to fall.3. Easy to install, large bearing, stable operation and no jamming.4. Portable size does not take up space and is convenient to carry. Specification:Material: Alloy Steel Pre-Telescopic Size After Telescopic Stem Diameter80mm 80mm 120mm 6.35mm 11mm120mm 100mm 200mm 6.35mm 11mm140mm 120mm 250mm 6.35mm 11mmNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.1 x Batch Head Extension