The following expandable items are warranted against defects in workmanship and materials for ninety(90) days from date of purchase: sockets, screw driver bits and accessories, sanding and back-up pads, impact mechanism, chisels and their retain ers, cutting and grinding accessories and any other expandable items not specifically mentioned. Normal wear and tear, service or maintenance items such as O-rings, springs, gaskets, packing or seals, fluid needles and nozzles, motor vanes or blades, col