Review on Stainless Cutting Bolt Dropper Fasteners by Born Waheed

These screws had many problems. I've screwed 3/4" CDX plywood into pressure treated pine and the screws often came loose before the head was flush with the plywood. Therefore, before installing the screws, all placements had to be countersunk first. Either the self-drilling tip is too aggressive or the threads on the screw are not large enough to fully retract it, or both often threw a screwdriver out of the drive socket and snapped it off when the screw was only partially tightened, forcing it to turn slowly to get the Maintaining control of the propeller slowed the process. When the socket was partially damaged by the screw it was often impossible to flip the tool over and remove the screw so I had to use ViseGrips to loosen it. Probably 10 % of them broke when I was done Unfortunately I had a deadline and no time to replace them so I had to go ahead and use them.