I have seen a device that looks like a paint roller but has rows of spikes.?

It is used for getting rid of air bubbles under a layer of floor tile glue before laying the tile, I need one, but I don't know what it is called, and am therefore having difficulty finding it on line or elsewhere.I have seen a device that looks like a paint roller but has rows of spikes.?
Never heard of such a thing until I tracked it down. I don't know if it's also suited to pricking the bubbles of floor tile adhesive but you can ask the folks who suppy it:





http://www.csunitec.com/spiked_rollers/s鈥?/a>I have seen a device that looks like a paint roller but has rows of spikes.?
Is it a squeegee?

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