Get your blades sharpened by post. We will hollow grind your Timberwolf blades to Timberwolf's OEM specification on our state-of-the-art ChipperMaster blade grinding machine. It's as easy as 1-2-3 1) Download and print off the FREEPOST label. 2) Securely wrap your blades and drop them off at the post office. 3) Sit back and wait - we will call you for payment and they will be back through your door in about a week.