Knipex preciforcereg crimping pliers knipex 97 52 35 knipex preciforcereg crimping pliers for use with non insulated open plug connectors these are the tools the specialists go to for daily crimping applications without the need for solder they work precisely and reliably and are light and comfortable to use knipex 97 52 35 preciforce crimping pliers non insulated open plug type