No. Using the larger diameter punches and dies will overload the driver and cause driver failure. This is not covered under warranty. For any hole punching over 2″ we recomend our Slug-Out Knockout Mechanical Driver, the KOMD1. This unit can punch 1/2″ to 4″ holes.
We only carry a seal kit for the KLP2 (KLP2K2) because most of the small parts in the KLP2 are common replacement parts. The KLP6 has the (KLP6K1) repair kit.