Jeff Hart's drill bit was a percussion type (rotation plus percussion) for hard-rock drilling. The bit, made by a company in Pennsylvania, was the reason his drill beat the other two, which depended only on rotating diamond fitted bits.

Credit belongs to many, as the Chilean president pointed out. Some contributions were large, some small, but they all helped.

The capsule was built in the shops of the Chilean Navy.
The dark glasses and some other equipment, one of the small contributions, came from a company here in Calgary.
The cable was rapidly shipped from Germany, where its type is made to hold gondolas on aerial tramways.
Geotec engineers helped in several ways.

Guest CLW, many more need credit; a few were mentioned in passing but somewhere a full iisting should be posted.

The section boss (last man up) kept discipline among his crew, extremely important.
The man with paramedic training worked out minimum rations for survival. It was two or more weeks before the men were located and a small conduit drilled through to provide them with food, medicine and contact with the world above.
The families of the men sent messages that kept spirits up.
The Medical Services of Chile helped in many ways.