aiyun Drill Bit Exdension aiyun Drill Bit Exdension 6-piece set 6-piece set: 2"(60mm)X2, 4"(100)mmX2, 6"(150mm)X2 Locking mechanism and strong built-in magnetism make it easy to pop up batch head automatically. In installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool . Great for DIY work, household maintenance, and most general repairs. aiyun Quick Release Magnetic Drill Bit Holder with 1/4” Hex Shank Quick replacement, convenient and fast Locking mechanism and strong built-in magnetism make it easy to pop up batch head automatically, fast and quick release ensured. 1/4" Hex shank for easy install and remove It is 1/4" hex shank specifications can be easily installed or removed. Magnetic Drill Bit Holder Magnetic bit holder provides convenient pick-up and retention of screws. Note: Be sure to use safety glasses during operation, and keep your hands or face away from the rotating drill and cutting powder. Please read the instruction manual of the power tool to be used carefully, and follow the warnings and precautions of each manufacturer to ensure safe operation.