Product Details:
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.