100mil 10pin 2x5 IDC flat cable for e.g. ATMEL-ICE from 0x1B on Tindie
Atmel-ICE
Atmel-ICE Basic Kit, Powerful development tool for debugging and programming Atmel SAM and AVR microcontrollers
Amazon.com: Waveshare Atmel-ICE Basic Kit Powerful Development Tool for Debugging and Programming Atmel SAM and AVR Microcontrollers with Adapters and Cables : Electronics
Tc2030-ctx 6-pin Cable For The Architecture Atmel-ice - Cable Winder - AliExpress