New with original tags. No. of Points: 12. Opening Size:17 mm. Opening Type:Open/Box. Length Group:Long. Material:High Alloy Steel. Finish:Chrome. Measuring System:Metric. 72 tooth ratcheting box end needs a minimal 5 to move fasteners vs. 30 for standard wrenches Off-corner loading design on box end provides better grip and reduces fastener rounding Pass-thru technology works down any length of threaded rod and long bolts Thin head and beam provide greater access in confined work areas Size conveniently stamped on both ends of the beam for quick identification Manufactured from alloy steel for better strength and longer tool life Bright, full polish chrome finish wipes easily clean to resist rust and corrosion Meets or exceeds ASME and ANSI specifications Surface Drive provides a stronger grip on fasteners, reducing fastener rounding Sleek head design enables access to tight spots where a ratchet will not fit Ratcheting box-end needs as little as 5 degrees to move fastener VS 30 degrees for standard box end wrenches