dji folding props produce vibration & gello if not matched exactly - (S900 or S1000) you need to be able to measure them to within 0.01g to ensure they are a matching set or do some sanding to one of them. dji S1000 owners would be advised to travel with one as any imbalance can leave you with ruined video footage. Experienced multicopter pilot strip weight OFF their craft and see every gram saved as more flight itme.
Also vital for helicopter blades and helicopter tail rotor blades used with high end autopilots like Aceone, Wookong H or NAZA H as vibration in the head or most importantly the TAIL can cause the Acc to spike 4-5 minutes into a flight. Self illumiating backlit LED - easy to read in any light. Laser etched CarbonBird logo.
NOTE - Also has a VERY accurate counting feature - we use the here at Multiwiicopter.com to count tiny M3*5 screws and they are amazing fast and accurate at counting parts !