High performance replacement punches designed to nibble through instead of shearing or sawing through materials. Will withstand high rates of strokes per minute. Nibbles through aluminium, cold-rolled steel, tin, plastic and other materials without distorting the material. For use with Silverline Air Nibbler (244980). High performance replacement punches designed to nibble through instead of shearing or sawing through materials. Will withstand high rates of strokes per minute. Nibbles through aluminium, cold-rolled steel, tin, plastic and other materials without distorting the material. For use with Silverline Air Nibbler (244980).