Custom designed specifically for the AR platform; the JE Machine innovative armorer's block is manufactured from a non-marring polymer blend to make working on your weapon a breeze. With plenty of support channels, pin retention pockets/pass throughs, and a magnetic panel to keep those pins and detents together you'll wonder how you ever lived without one. FeaturesTextured Anti-Slip, non-marring surface.Directional design for assembly and disassemblyPowerful magnetic plate to keep your pins and detents in one placeIdeal for gas block installation and removalWorks with most AR platforms