Clamp hole punch in a table vise clamp. Punches 2 sizes hole 1.5mm and 2mm neatly in copper, brass, aluminium and thin metal sheets. Also punches styrene and wood sheets. Holes punched for attachment of O rings or rivetting with brass or copper rods and tube rivets. Ideal hole sizes for cold rivetting of metal jewellery and scalemodelling metal crafts.