Stanley rustless metal rules stanley 0 35 400 buy stanley 64r rustless rule 150mm6in an engineers precision rules with both metric and imperial graduations incorporating the following features rigid rustless steel material 150mm measuring length 16ths 32nds 64ths 10ths 20ths 50ths 100th imperial side graduation 05mm metric side graduation graduated on both sides and all 4 edges hanging hole stanley 0 35 400 64r rustless rule 150mm6in