Kaka. These guys are very sociable and willing to help solve any problem. When I first received the device, I started with some test cuts. I used 18g aluminum and after about 5 cuts the device broke. The upper half, which is screwed, is actually separated from the body, most likely it is a casting error. I contacted Kaka and they sent me a replacement without question and paid for the cost of returning the defective unit. As for the performance of the device, it works damn well. It also cuts and bends easily. Would definitely buy from them again.