【Double Lock】Our drill bit extension has a locking device at the red lock, along with a slightly magnetic sexual block at the bottom of the hole, ensuring that the screwdriver bit or drill bit is securely fastened in place, and reduces the displacement possibility of screwdriver or drill bit. You simply slide the locking device on the magnetic position holder, which can be completed with one hand, and quickly and easily change positions, greatly improving work efficiency.

【Reliable Materials】The drill extension is made of industrial heavy-duty chrome vanadium steel, there are extended threads at the interface connecting the drill bit, which can work better. One-piece telescopic or press-pop-up structure, more convenient to use.

【Universal size】The drill extension bit holder is designed with 1/4" hex shank and a 1/4" extension chuck adapter,fit for all inserts and 1/4 inch, t-handle 1/4’’ screwdrivers, corded drills, impact drills, or any other device with a 1/4 inch hex shank. The drill bit extender is perfect for maintenance repairs or diy work in automotive, hardware, home and other fields.

【Package Content】You will get 4pcs magnetic drill bit extender 1/4 inch, includes 4 Length: 2"(60mm),4"(100)mm,6"(150mm) 12"(300mm) to satisfy your various needs.

【Perfect Gift Ideal】This 1/4 extension set will be a housewarming gift, a practical gift for your friends and they will love it very much