Features and Benefits:Magnetic insert firmly holds the fastener in the socket for easy installation/removalPrevents fasteners from dropping into restricted areas where they can be difficult to locate and/or retrieveMagnetic insert can be left in or removed for use in other socketsIncludes nineteen pieces: SAE and Metric sets combinedMade in the USAMagnetic insert firmly holds the fastener in the socket for easy installation/removalPrevents fasteners from dropping into restricted areas where they can be difficult to locate and/or retrieveMagnetic insert can be left in or removed for use in other socketsIncludes nineteen pieces: SAE and Metric sets combinedMade in the USA