Imigozi ya Allen nigice gihuriweho nubukanishi busanzwe bukoreshwa mugukosora no guhuza ibikoresho nkicyuma, plastike, ibiti, nibindi. ubushobozi. Hexagon sock screw ikozwe mubyuma byo mu rwego rwohejuru cyangwa ibyuma bidafite ingese, bifite imbaraga zo kurwanya ruswa hamwe nimbaraga zikomeye, kandi bikwiranye nibidukikije bitandukanye ndetse nakazi keza.