Known as “wire”, “open”, or “see-through” targets, these are great for establishing reference points along a line of sight. Use these targets at various focal lengths (e.g., down a bore) looking “through” each one to the next. Our 395 Series comes in a variety of wire gaps, and the 795 has a multiple-distance target pattern built in, along with a handy “clocking” wire used to keep track of which target you are looking at.