If the photograph is clicked, it grows.

Tektronix 343-1003-01 Low Inductance Collar GND
JPY500 21 stock
osc871

Tektronix P6137 P6139 etc
Low Inductance GND about 32nH (resonance about 350MHz)

Normal Probe ground lead
Ground Lead 15cm 140nH (fo= 180MHz)
Trr=2ns