Heavy knurling reduces the chance of your fingers or hand slipping off the charging handle during stress fire situations or when wearing gloves.    Provides light weight, consistent reliable functioning.    Rounded edges provide a snag free operation.    All edges are deburred for the shooters safety.    The Rem1100/1187 Enhanced Charging Handle does not rotate.    Manufactured from 4140 ordnance steel.    Heat treated to Rockwell 45 C to sustain the punishment of professional use.    Manganese phosphate finished matte black per mil-spec.