Small PCB Test Points (100 pack) - Red : ID 3825 : Adafruit Industries, Unique & fun DIY electronics and kits

Retractable Stacking Banana Plug Cable - Black 0.5 meter long : ID 5472 : Adafruit Industries, Unique & fun DIY electronics and kits

Pomona Minigrabber Test Clip to Stacking Banana Plug - 12 [Black] : ID 2611 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Prototyping Products Category on Adafruit Industries

Prototyping Products Category on Adafruit Industries

Tools, Test Equipment Products Category on Adafruit Industries

Retractable Stacking Banana Plug Cable - Red 0.5 meter long : ID 5471 : Adafruit Industries, Unique & fun DIY electronics and kits

Electronics Component Fun Kit w/ Power Supply Module,Jumper Wire,Breadboard for Arduino - Rexqualis Industries,Ingenious & fun DIY electronics and kits

Electronics Component Fun Kit w/ Power Supply Module,Jumper Wire,Breadboard for Arduino - Rexqualis Industries,Ingenious & fun DIY electronics and kits

Spot Welder Control Board Diy Kit 99 Gears Power Adjustable - Temu