We will introduce new knives at the Expo. Along with making mower blades, we do custom lawn mowing & have been running them on our mowers. We have seen that they stay sharp longer & the lift is changed enough to give a nicer cut. Staying sharp longer, a better cut & smaller nicks will help all types of mowing & save money. See us at Booth #11051! The new knives will be ready the first part of November 2007.