A replaceable ring shaped member for a clamp foot air jet apparatus for a clamp foot for clamping a plate for a cutting tool, includes a clamp foot assembly having an outer ring shaped member fluidly and supportably connectable to the removably ring shaped member. The inner ring shaped member includes a central aperture for the cutting of a plate to be located. An outer curved edge surface of the inner ring shaped member includes at least one abutting surface to sealingly abut a curved edge of the outer ring member includes a groove for directing air from the outer ring member and through at least one hole in the inner member, whereby a fluid can be directed through each hole to the central aperture, and whereby at least one fluid jet can be formed to move coolant and/or waste from the cutting location with respect to the clamp foot.