Lots of good info on whats what with inserts, grades, coatings and
lots more can be found on the below website. They also have some gret
prices on their stuff as well.

Address listed is for their technical info pages........sales pages
are easy to find if desired........Their dollar store and generic
section is a good deal most of the time.

http://carbidedepot.com/resources.htm
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The original frugal ponder ! Koi-ahoi mates....