KS Tools 9637526 Bronze Plus Double End Box Wrench, 1.3/16 X 1.1/4 "

Country of Origin: Germany Item Dimension: 13.7795"L x 9.84252"W x 5.11811"H Model Number: 4042146529676 The dovetail design provides an exceptionally strong connection and allows for complete head interchange-ability across the full spectrum of torque ranges All of SK's interchangeable heads are made from a single piece of alloy steel