Johnson 18cm Professional Aluminium Rafter Square (Metric):
The Johnson Johnny 18 cm Metric Square is made with an aluminium body that has CNC machined edges for accuracy. The Johnson Johnny square has been produced with a thick edge to enable you to use it as a saw guide.
Scribing Notches - from 2cm to 12cm
Thick Edge for use as a saw guide
Cm scale starts from 3cm to 10cm