The quick-release design of the drill bit extension kit ensures efficient and convenient use. You can hang it onto your belt, your tool bag, your ladder, and more 1/4Inch, 3/8Inch, 1/2Inch, 5/8Inch, 3/4Inch and 7/8Inch 1/4 Hex Drill Bit Holder: The quick-release design of the drill bit extension kit ensures efficient and convenient use. You can hang it onto your belt, your tool bag, your ladder, and more Compared to other copper tube flaring tools, our 6-in-1 copper pipe swaging drill bit with 6 sizes, eliminates the need for frequent size changes. It's portable, easy to use, highly efficient, and for money With a 1/4inch hexagon handle, the drill bit set is simple and easy to use, which can be directly connected to the electric drill interface It creates leak-free connections, providing high efficiency, speed, and visible results, ultimately saving you valuable time *Please wear anti-scalding gloves, goggles, and other safety during operation