I didn.t had the chance to use them, but it looks very good, strong, and quality, only issue was with 2 missing bolts, and the platform those 2 black parts of metal are not quite straight., but i sort it out.
After years of "near misses" with conventional Spring Clamps, things had to change. Should have done it sooner, This Tool is the Biz..
Not only is it safer, it took a good hour off the job.
Good solid build. Defiantly recommend.
Gabriel IOAN UNGURASU 
