Most of Irwin's tools have been exceptional, durable and quality centered. The bolt-grip deep well socket set is no exception. I've owned the standard well, regular bolt-grip set now for 6 years and its worked perfect for stripped bolts. This set is identical in quality to the old set I've used. So far, I've used this set to loosen up a stripped bolt on a spark plug for an older truck of a family member. Worked perfectly, snugging down on the bolts corner edges and popping that old plug loose. The deep well slipped right over top of the spark plug without a hitch. A+++
Rating: [5 of 5 Stars!]