FIXDEX wedge arịlịka / site na nkwakọ ngwaahịa bolt FIXDEX hex bolt / hex nut / flat washer brand mbukota FIXDEX ike tensile sleeve arịlịka ika mbukota FIXDEX Mgbasawanye Screw Bolt Heavy Duty Hollow Wall Anchors mbukota ika FIXDEX ịhịa aka na-akụ onwe ya na mkpọkọ akara akọrọ