This expander is made of , which can withstand long-lasting use. Features the steel material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This expander will make the repair and fix easier and smoother. Features -Color:Black -Material:Steel -Size:5.50X3.00X0.70cm/2.16X1.18X0.28in Specifications: 7/8 (22.2mm), 3/4 (19mm), 5/8 (15.9mm), 1/2 (12.7mm), 3/8 (9.5mm), 1/4 (6.3mm) - Comes with various diameters handles, complete specifications, and a wide range of applications. - Widely used in the maintenance of refrigeration equipment such as refrigerators, freezers and air conditioners. - Extrusion type adapter and metal processing, the tube expander is easy to operate. - Function: When the air conditioner is installed, the copper are expanded to connect the two copper with each other. (Need to be installed on a hand electric drill). - Fine workmanship, durable and sturdy, not easy to wear or tear, you deserve to have one. Package list: 6 x drill bits