Mayata 1Set/4PCS 15cm 20cm 25cm 30cm Multifunctional PCB Ruler Measuring Tool Resistor Capacitor Chip IC SMD Diode Transistor Package 180 Degrees

These are the coolest rulers I've ever seen, really helped me quickly lookup and replace specific SMDs I didn't know the part number of.

First and foremost the packaging for these rulers is just cling film wrapped around the bundle of rulers about a thousand times. Not particularly reassuring for something you might use as a measurement tool.My main problem with these rulers, though, are the spelling errors and other strange design decisions. The smallest one is the only one that doesn't have a major design issue, and that's because it's a clone of the Adafruit ruler.On the 12 inch, 30cm ruler, centimeter becomes centimsier, inches becomes incjes, inductor becomes inbuctor, trace becomes trcae, etc. Other weird quirks include the web address for an australian cloud computing company, another web address that's dead, a quote full of grammatical errors, and one occurence of chinese characters.The quality between the 4 rulers are also vastly different. the black PCBs are different in finish, texture, and thickness.Please don't make my mistake and buy this set.

This is a very good set