Professional tool for commercial or occasional use. Manufactured from stainless steel for long lasting and rust resistance. Standard high precision rule for craft, workshop and engineering use. Can be used as a straight edge as well as a ruler. Precisely deep etched with permanent black filled graduations. Comes with metric to imperial conversion tables as well as tap drill rules on the rear of the ruler. Total Dimensions of the Ruler : Total measuring length 150mm / 6" Total width 20mm Total thickness 1mm