The Old Hob is a single battery 26650 mechanical mod made from copper and brass.
The 510 is 22mm and offset to the side of the device. It also has a spring adjusting center post.
The firing switch is on top of the battery cap which is friction fit so it slides on and off with some minimal twisting. There is a video that shows this mod in operation under the video tab.
Because this is a mechanical mod it is use at your own risk. Care should be taken with low resistance and you should educate yourself on the limitations of your batteries. I will not be held responsible for personal harm or property damage as a result of its use or misuse.
This sale is for the mod only, no batteries, chargers or atomizers are included.