Wrench c non sparking ReferenceAlloySize (S)Length (L)S1xS2079106 BeCu 20 mm 200 mmwrench c Beryllium copper 20 mm 20 mm 200 mm 14,5mm x 18,5 mm 083506 AlBr 20 mm 200 mmwrench c Aluminium bronze 20 mm 20 mm 200 mm 14,5mm x 18,5 mm