Sarissa Resources Inc (SRSR)

[The Holder]

Yeah, I think those are used in soil drilling, where the substrate is softer.

In my experience, those "tubes" are a clear poly plastic that you can cut to open with a special tool that has 2 razor blades on the inside and a handle. You can't use them to drill through igneous rock...it's too hard and shreds the tube.

Google "Geoprobe" and you can learn more about it.

<img src="http://www.geoprobe.com/images/i_products/i_accessories/dt32linercutter2.jpg">