Short Wire Alligator Clip Test Lead (set of 12) : ID 1592 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Buy 35mm Double ended crocodile alligator clip with Red and Black wire pack of 5 pair
TC Electronic PolyTune Clip review | MusicRadar
Amazon.com: TC Electronic POLYTUNE CLIP Clip-On Tuner with Polyphonic, Strobe and Chromatic Modes and 108 LED Matrix Display for Ultimate Tuning Performance : Musical Instruments