For sale is a Pack of 5, Interstate Carbide Inserts, No. SPG 421 I55.  The inserts are new and unused but the pack has been opened and there are only 5 Inserts remaining.  These inserts were bought at auction as a part of a large lot of carbide from a machine shop that went out of business.  They are New-Old-Stock.  The inserts shown in the pictures are the exact ones you will receive.  They will be shipped promptly from Missouri.  Thanks for looking.