Keep L-Square Stationery
This inexpensive, durable CRL Phenolic "L" Square really does the job when it
comes to making accurate cuts. Because it is made of high impact phenolic, it
will take a lot of punishment without warping, and last a long time. With this
precision instrument, you can make fine calibrations for a true square by
adjusting the hex head screws so it can always be at a 90 Degree cutting angle.