Sette ST-609 Steer Tube Cutter
Handlebars, seatpost, or steertube. Whatever it is you need to cut down you can do it with the Sette ST-609 Steer Tube Cutter. This is a great tool and a "must have" for your bike tool collection.
I've cut several steer tubes, one set of bars, and one seat post and the Sette steer tube cutter has been reliable. I think it may be getting a little dull now and I've had it slip once and cut off track. WAY better than a hacksaw. Great deal for the price.
Tight fight on standard size tube. If you have a 1.5 I don't think it would work...won't open wide enough. Fairly clean cut...a cinch to smooth with a small file afterward and would probably have worked fine without filing at all. Far easier then a hacksaw with better results too.
So far have cut 8 bars, 3 posts and 4 steerer tubes. Works great, however I've found the twist knob is starting to go. But for the money, its great!