Features 1、This flaring tool drill bit kit has six different sizes, meeting your various needs for tube expanding. 2、The copper tube can be easily expanded and accurately positioned with this swagging tool drill bit set. 3、You can also use it with a hand electric drill for higher efficiency, and the installation is very simple. 4、The excellent steel drill bits are very strong and hard to deform, and very durable for long‑term use. 5、Small size together with light weight largely simplifies the carrying as well as the storage. Specification Item Type: Swagging Tool Drill Bit Material: Steel British Standard: 1/4in, 3/8in, 1/2in, 5/8in, 3/4in, 7/8in. Expansion Range: Suitable for the use of 5 ~ 20mm / 0.2 ~ 0.8in (Approx. ) diameter copper pipes. Package List 6 x Swagging Tool Drill Bit