Manufactured from correctly hardened and tempered chrome vanadium steel the long arm is particularly useful when working in confined spaces and varies in length from 65mm on the 07mm0028 through to 170mm on the 10mm 38 size display packed in plastic case whats included07 09 13 15 20 25 30 40 45 50 55 60 70 80 and 100mm 0028 0035 0050 116 564 332 764 18 964 532 316 732 14 516 and 38