The special socket design of the Lisle Seized Fastener Remover Set, No. 60260, applies the impact force to the center of the frozen bolt through the nose on the pneumatic driver. These low-profile, heat-treated sockets center the pneumatic driver on the frozen bolt. The hex shaped socket floats on the driver allowing a turning wrench to be used while impacting the bolt head. Six socket sizes fit up to 0.830" hex. Focuses the pneumatic hammering action on the center of the fastener. Made in the U.S.A.