3D-printed tools and accessories
3D-printed knobs release valves for most bottle jacks (including discontinued Harbor Freight bottle jacks - Pittsburgh, 4-, 8-, and 12ton low profile-tested, H-frame 12-/20-tons). Select color and bottle-jack type - the Arcan knob should fit most jacks (pictured are orange white and green, black also a choice). Other options for tool-cap stand/marble orbiter, etc. are listed as available, see pull-down menu for options.