Heavy duty PVC grips. Crimps sizes: 1.5mm (red), 2.5mm (blue) and 6.0mm (yellow). Crops threaded terminals M2.6, M3, M3.5, M4, M5. Wire stripping 0.75, 1.0, 1.5, 2.5, 4.0, 6.0mm. Compatible with Amtech B3300 insulated crimp terminals.