Wera 05073511001 887 4rr premium plus rapidaptor ringmagnet bit holder wera 05073511001 the rapidaptor bit holder from wera combines rapid in rapid out rapid spin chuck all and single hand functions this rapidaptor also has a ring magnet to ensure the screw remains securely on the bit even when working overhead or in other difficult situations wera 05073511001 887 4rr premium plus rapidaptor ringmagnet bit holder