These types of pre-inked inspection stamps, quality control and quality assurance stamps are used a great deal in industry, particularly in  manufacturing stages, also in the packing and distribution industries too.  They are usually small self inking stamps, mainly round or square lodged in a small neat case easily carried in a pocket.  We use computer aided design for your choice of words or numbers and then make the die from natural rubber. Individual orders for these stamps are possible through we often do a batch of several dozen at a time, each having individual numbers for identification purposes.  Replacement ink  pads are available from us.