Soft and Hard adjustment knob. Insert the tool into the needle's hole then rotate the tool to get soft and hard. There is a Max Ban line on the tool, you can't rotate over the line. After adjusting the soft and hard of the machine, insert the cartridges into the machine, connect the DC line, and the machine starts working. Mast Player Edition tattoo machine has needles depth adjustment, locater. Rotate the machine grip to adjust the needle's depth. Note: This listing only includes one Mast Player Edition. More parts need to buy Mast Kit listing, please check more details. The Dragonhawk Mast Player Edition rotary tattoo machine made of a Space Aluminum frame and Japan motor. Length: 11.7CM. Weight: 120g. Dragonhawk Mast tattoo machine allowing a tailored tattooing experience to accomplish a wide variety of styles and techniques, well-rounded rotary tattoo machine designed for utmost accuracy and control. Emulating the grip and feel of an actual pen, this machine allows for more comfortable and precise tattooing procedures than traditional machines. Ergonomic, lightweight pen-style machine. This machine features a powerful motor and an advanced gear system that guarantees reliable, quiet operation without any vibration The machine has a working voltage of 6V–9V. Pebble modeling. The Dragonhawk Mast tattoo machine is compatible with all cartridge needle types.