Amazon.com: 2.54mm to 2.0mm Pitch pin Header Adapter Cable for PC Serial Port, 3-Inch Length (1 Pack) : Electronics
Amazon.com: Electric Marking Machine Metal Marking Machine Dot Peen Marking Machine Marking Depth 0.1mm-2mm for Marking Code, Serial Number, Letter, Logo HeatSign
Amazon.com: KUNTAI Bench Top Dot Peen Marking Machine with Touch Screen with 11.8inch×7.87inch Marking Area
Fartools One 119220 Diamond Cutting Wheel 230 x 22.2 x 7 x 2.4 mm - - Amazon .com