Laser Targets，2 pcs Magnetic Floor Laser Target Card Plate for Red Laser Level

Makes hanging grid a breeze

Great for levelling ceiling chanels

I don't know why I thought these were jumbo sized. The numbers on the front are inches.... Actual inches. It works great for red lasers. Magnets are strong. Angle from bottom plate to front face is 90 degrees. It's small, so I don't know if it'd work at 600ft, but it'll put a laser readable surface out to how good of an aim you are.

This set of two laser targets are supplied in a polythene bag without instructions. They are shaped and coloured Perspex with a reflective strip stuck on the back and two small magnets incorporated in the base. This set is coloured to work with red lasers. Having additional targets is useful and these ones can be stuck to steel structures which may be useful. The laser targets have both imperial and metric scales which can be used to calculate rises and drops. These are a useful addition to a laser setup but are not essential and seem a little expensive for what they are but if you need them they work well.

Magnet keeps it in place