The good reasons for using the Knipex Cobra adjustable pipe and nut pliers are obvious: this pliers are light and stable, quickly adjustable on the workpiece via button and self-tightening on pipes and nuts.
Ideal to write on rough or smooth surfaces and to also mark the deep holes, mina graphite universal d.mm.2,8 - automatic mechanism, metal button, pencil full of mina and sharpener included in the button.