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These are no ordinary sockets. While they appear identical to regular sockets from the outside, each inside corner of the hexagonal well has a floating steel gripping finger that acts as a wedge, locking against the flats on the nut or bolt head (or what little remains of them) as the socket rotates. The more force you apply to the ratchet handle, the more tenaciously the fingers grip. Not only do they excel at the miserable job of removing hex nuts and bolts that have rounded corners, they also grip the fastener firmly so that you can unscrew or install it one-handed. Made of nickel-plated chrome-vanadium steel for durability and rust resistance, the 3/8" drive sockets come with a lifetime guarantee.
Not just for removing damaged nuts and bolts, the sockets' ability to grip fasteners makes them useful in everyday applications.
A true frustration saver. Highly recommended. Made in the USA.
Supplied in a molded storage case, set of seven includes 3/8", 7/16"(11mm), 1/2", 9/16", 5/8"(16mm), 11/16", and 3/4"(19mm).