Hello, Please delete if not allowed but I recently aquired an assortment of reamers, Many seem custom and job specific. I'm hoping someone can share their wisdom on a variety of reamers which has me stumped. I'm curios if they are made for a specific machine/ purpose and any information would be greatly appreciated. I'll post pictures below but all are roughly 24" long, shank end is 7/8" diameter, with a 3/4 squared end and is alsp tapped at the end for 1/2-20.