Jaw keeper prevents jaws from spreading while under heavy load Cuts copper and aluminum communications power cable up to 2" Improved heavy duty jaw design Built for tough conditions Ratchet provides up to 5x's the mechanical advantage over manual cutters Cuts all types of copper and aluminum cables up to 2500MCM Replacement cutterhead: 8613FSK NEVER use any H.K. Porter cutters on energized circuits, wire, or cable!