Master Lock S1506 ƙaramin madaidaicin madaidaicin an yi shi da ƙarfe mai kauri tare da murfin foda mai dorewa don tabbatar da tsawon rayuwar kayan aikin samarwa.Firam ɗin 140mm na iya ɗaukar makullai 5-6, gami da alamun Ingilishi, kuma ana iya keɓance wasu alamun harshe.