Professional bolt extractors for commercial or occasional use Shallow bolt extractor set 3/8" drive extractors so suitable for any 3/8" drive ratchets / bars / impact guns etc... Impacted for strength and durability so suitable for impact use if required Twist extractors to remove broken studs, pipes, set screws, grease fittings etc... Special reverse left handed thread sockets Precision kit allows you to extract hexagonal bolts which are corroded or seized and need to be removed without damaging the casing or thread Manufactured from cr-mo hardened steel for maximum durability Will easily bite into and grip the softer bolts Shallow design allow access into hard to reach areas - total height 27mm SET INCLUDES THE FOLLOWING SIZES • 1/4" (6mm), 5/16" (8mm), 3/8" (9.5mm), 7/16" (11mm) and 1/2" (12.7mm) As well as being able to be used with a ratchet the item has a hex end so can also be used with a socket or a spanner as well