Craftsman® V-Series tools are designed to professional specifications bringing tool truck quality within reach.͍With patented X-Tract technology, removing rounded or rusted fasteners just got easier. The Craftsman® V-Series 9pc X-Tract SAE T-Handle Set is designed to remove fasteners up to 50% rounded, while also helping to prevent rounding or stripping of new fasteners. The X-Tract grooves in the tip create additional engagement points for gripping and help to release stress on the interior of the fastener as you turn. Each key is also manufactured from premium S2 steel for strength and durability, with an ergonomic, over-molded handle for additional grip in high torque applications.͍This set includes 5/64", 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8"