Find US shops that make small batches and one-off prototypes

Help me figure out what I need · I know what I need

• CNC machining: Cut from a solid block
• 3D printing: 3D printed (FDM, SLA, SLS)
• Sheet metal / laser cutting: Cut and bent from sheet metal
• Urethane casting: Cast in a silicone mold

Placeholder (mvp-scaffold). Launch states: CO, CA, TX, MA, plus shops that ship nationwide.