Even sold secure gold d-locks can be cut with angle grinders. The bigger/better ones can't be cut with even big bolt cutters though and that's part of the sold secure rating.Saw what was labelled as a Kryptonite lock on a cycle stand a few days ago; the shackle had been neatly cut through.![]()
The Litelok and the big Hiplok locks are resistant to angle grinders due to other materials they include in the shackle. Resistant, not proof of course.