THIS ABILITYONE ITEM IS EQUIVALENT TO THE FOLLOWING MODELS: PROTO 38734844 WILLIAMS 1218MSC PROTO 1218MT500 MATCO MCL18M2 PROTO 5771218MT500 PROTO J1218MT500 WILLIAMS JHW1218MSC MAC TOOLS M18CL440 MAC TOOLS MB182KS MATCO MCL18M2 PROTO PRO1218MT500 SNAPON SOEXM18 SNAPON SOEXM18. SKILCRAFT ProGrade Combination Wrenches 18mm BRAND NAME: SKILCRAFT. Premium grade, high polish chrome finish 18mm combination wrench with open and box ends. Made of forged and heattreated steel for extra strength and durability, these combination wrenches feature a continuous arc design that distributes applied stress over the entire radius of the open end. The 12point boxend features a 7.5 degree offset broaching that allows users to flip the end for a more advantageous grip in tight spaces. Available in a variety of sizes, these U.S.A. made, Berry Amendment compliant wrenches meet or exceed SAE Aerospace Standard 954 for 12point fasteners and carry a limited lifetime warranty. SDS SHEETS: Yes. ENVIRONMENTAL SUSTAINABILITY (GREEN) INFO: PreConsumer Recycled Content: 0