Dot Peen Marking Machine Manufacturers And Suppliers That Provide A Variety Of Dot Peen Marking Equipment And Solutions. The patented aluminum marking head is protected in a tough polymer case. This allows the P50-25 to be used in most industrial environments reducing the need to transport heavy items requiring marking to the marking machine. Weighing only 2.3kg the P50-25 ensures operator fatigue is minimized while productivity is maximized.