Steel practice plates 27/8" x 9/16". Practice your engraving with these two smooth sided practice plates. Five per package. The allround machine: the modular design creates the individual machine – a smart alternative to 4 separate machines. The required module is mounted within seconds and is instantly ready for operation. technical accessories and new applications are developed in modular design, so the machine can be extended for future engraving tasks easy to operate, it takes only minutes to familiarize with the machine.