With a size of 12mm, this double-end wrench features a 6-point drive type for easy and precise tightening and loosening of nuts. SNAP ON 10-12mm BRAKE NUT SPANNER.
As with all snap on spanners this has the perfect form to best fit old and damaged nuts, perfect for removing rusted flair nuts from 20 year old brake lines without issue.
Wouldn't use any other make.