M5 and M6 threads in plastic? One hard turn and they're gone. You don't need to start over. These heat-press brass inserts drop into your printed or moulded part, and you've got a proper metal thread that takes real torque. 90 pieces covering ten combinations (M5x4x7, M5x7x7, M5x8x7, M5x9x7, M5x8x8, M6x8x8, M6x8x9, M6x9x9, M6x9.5x9.5, M6x10x8) so you're not hunting for that one odd size at 9pm. High-quality brass. Built to be assembled and disassembled without the thread chasing itself out of the plastic
