Will this cut through braided stainless steel brake lines?

Yes, the rotating wheel scores through braided lines cleanly. The key is steady hand pressure — let the cutter do the work instead of forcing it, and you'll get a square cut without collapsing the braid.

What if my tubing is slightly larger than 7/8" OD?

This cutter maxes out at 7/8" OD. Larger diameter tubes (like transmission or power steering lines) need a full-size tubing cutter — the frame won't close enough to grip oversized tubing.

Do I need to deburr the cut edges after?

The rotating wheel leaves a fairly clean edge, but a light deburr with sandpaper or a deburring tool removes any sharp edges before you reconnect fittings. This prevents debris from entering your fuel or coolant system.