Knipex 8802300 12-Inch Alligator Pliers - Comfort Grip More output and comfort compared to conventional water pump pliers of the same length: offer 9 adjustment positioning for 30% more gripping capacity Good access to the workpiece due to slim size in the head and joint area Self-locking on pipes and nuts: no slipping on the workpiece and low handforce required. With comfort grip handles Gripping surfaces with special hardened teeth, teeth hardness approx. 61 HRC: low wear and reliable gripping Box-joint design: high stability because of double guide