Uhlobo lwe-GR olunentamo encishisiwe edizayinelwe ukusetshenziswa ngezikulufu zodonga ezomile. Ukuze isetshenziswe nezibambi zebhithi ye-hex drive engu-1/4" kanye nezinsiza. Idizayinelwe ukusetshenziswa nezikulufu zohlobo lwe-Phillips nezinto zokubopha. Idizayinelwe futhi yakhiwe yaba yi-DIN ISO 2351-2 & DIN ISO 1173
PHR2 ukumaka.