Proto J7180P Impact Socket Extension, 1 2 in Drive, 2 in OAL, Alloy Steel, Black Oxide 4549K671 (15) 9 16 in Ear Clamp (15) 9 16 in Ear Clamp 23 Features Foam Material Comes with a Pressure Sensitive Adhesive on the Seam Flexibility Flexible Smoke Developed Index 143 Plenum Rating Plenum Rated Foam Cell Type Closed For Piping System Chilled Water Use extensions to gain access to fasteners in locations that would otherwise be difficult to reach Male square is oriented in line with female squares for use with fixed head torque wrenches Full chamfer at drive opening (when applicable) for easy engagement with drive tools Additional Features: Drive end chamfer and four detents help provide quick positive engagement with drive tool on any of the socket drive walls Size stamped on tool for easy identification Side locking hole SAE AS4984A Locking Yes Number of Points 4 Measurement Type SAE Output Drive Type Male Square Material Alloy Steel Input Drive Gender Female Output Drive Shape Square Non Sparking No Insulated No Input Drive Shape Square Output Drive Gender Male Socket Extension Type Standard Includes Insulation Not Insulated Impact Rated Status Impact Rated Includes Locking Locking Included Socket Extension Style Standard Additional Features: Drive end chamfer and four detents help provide quick positive engagement with drive tool on any of the socket drive walls Size stamped on tool for easy identification Side locking hole Country of Origin United States