These extra-long, flexible and reversible double box ratcheting wrenches are forged of chrome-vanadium steel and heat treated for durability. Wrenches in this 4-piece set feature a 72-tooth design with a high polish finish and are nearly 40% longer. Ratcheting box end needs as little as 5 degrees to move fastener. Sleek head design and slim dimensions further ease of working in confined areas. Set includes the following fractional sizes: 5/16" x 3/8", 7/16" x 1/2", 9/16" x 5/8" and 11/16" x 3/4". All KTI wrenches carry a lifetime warranty.