Dr.Al
Old Oak
Doug":5elb9z0n said:Dr.Al":5elb9z0n said:Doug":5elb9z0n said:they are supposedly made from aircraft grade anodised aluminium...
... which is a completely meaningless term that is popular with marketing bods. "Aircraft grade aluminium" is a generic term for certain alloys that have been used at some point by the aerospace industry. That doesn't convey any particularly special properties on them or mean that they are the best choice for a woodworking square.
I just thought they were referring to the hardness of the aluminium they use :eusa-think: aircraft grade is series 7 & more expensive than other grades, perhaps they are using the to term to justify their manufacturing costs.
I think it's mostly just marketing to make it sound more impressive. Read this page under "Other Grades": https://www.1stchoicemetals.co.uk/alumi ... des-guide/