machinest bits for milling and stuff ?

[sweetk30]

i scored some brand new diamond coated bits for milling work .

there sample marshall brand .

anyone got a clue what there worth ?

pics of just 2 i have few other sizes. hollow down center and out holes in sides for cooling fluid mabye ?

 

[rdn2blazer]

Wow, Been a machinist for 20 years and never seen anything like that. I would say yes to the through the tool coolent holes, but just the bit alone I have no clue of. interesting. I don't believe it's for a milling machine though. Shank looks just too odd. Is it tapered? kinda looks like it in the pic.

 

[smalltruckbigcid]

According to google fu they are tapered reamers for working in glass.
http://www.samplemarshall.com/index_files/Page1259.htm