HM Tools & Dye Coil Tattoo Machines - For tattoo artists who are loyal to the coil, HM has high quality coil machines that are manufactured completely in-house. The Iron Side Wheeler machines are the result of the collaborative efforts between HM Tools & Dye and French tattoo machine builder, Bruno Kea. These machines are available with 8 wrap or 10 wrap coils with a first-rate iron core. There are two types of these coil machines, liners and shaders.