Help Identifying a set of Drill Bits

[Chris Jordan]

I was wondering if any one had any information on this set of drill bits I came across - there are 6 bits, ranging from 3/8 to 1 in 1/8 increments, housed in a wooden box as shown.  I can find no markings on any part of the bits themselves or the box.  Any thoughts on manufacturer, uses, date would be great information, thanks in advance!

Chris

https://www.flickr.com/photos/130073277@N06/

[Billman49]

They look like glass or ceramic tile drills.. But never seen then that size before - mine are all sub 3/8"

[gibsontool]

I agree with Billman re. glass or ceramic. Try goggling Lee Valley Tools in Canada and searching their site. I know at one time they had some ceramic bits. I bought a few about 10 or 11 years ago. It appears to be a nice looking set,but if there is no markings at all it may well be Asian.

[Papaw]

 Study the text on the instructions. Poor spelling and syntax might be a clue to Asian origin.

[Nolatoolguy]

Yup, as others said tile an glass bits.

Those style are the worst if your asking me. I use to swear by bosch tile an glass bits like that but now I have switched over to millwakee mini plus diomond whole saws.

[Chillylulu]

These are sold at hardware stores in small sizes as glass bits. Glass (art or architectural glass) wholesalers don't sell that type, and even 30 yrs ago were using diamond bits. 

I would guess more tile than fir glass.  If you use them you have ti go very slow or you break your material.

I use diamond coated bits at higher speeds, both sintered on rods and hole saw type.


Chilly

[Nolatoolguy]

Below is the set I use to use. They wore out pretty quik an took a long time.They are cheaper at first, but don't last as long.

http://www.boschtools.com/Products/Accessories/Pages/BoschAccessoryDetail.aspx?pid=GT3000#specs

[bleonard]

same set for sale at Amazon . com
Bob