Birzman multi use ruler silver

the stainless steel birzman ruler is useful for every detail measurements are easy to read in metric and imperial units up to 310 mm there is also a table for ball bearings and to measure the rays diameters details table for radius length max 310 mm ball bearings 1 8 5 32 3 16 7 32 1 4 spoke diameters o1 6 o4 4 material stainless steel measures up to 310mm 12 2 features embossed markings ...