Strong, rare earth magnets securely hold 1/4 in, 5/16 in, 11/32 in, 3/8 in, 1/2 in nuts and bolts in place|Spring coil holds nuts and bolts in place without the use of 7/16 in, 9/16 in magnets|Hollow shaft for driving nuts deep onto 1/4 in, 5/16 in, 3/8 in, 7/16 in, 9/16 in bolts or threaded rod|Heavy-duty handle and shaft exceed the torque performance of regular nut drivers|Wrench-assist on handle for added torque on tough jobs