Double end box wrench offset non sparking ReferenceAlloyLength (L)S1xS2004705 BeCu 122 mmDouble end box wrench offset Beryllium copper 122 mm 122 mm 6*7 019505 AlBr 122 mmDouble end box wrench offset Aluminium bronze 122 mm 122 mm 6*7 004711 BeCu 128 mmDouble end box wrench offset Beryllium copper 128 mm 128 mm 8*9 019511 AlBr 128 mmDouble end box wrench offset Aluminium bronze 128 mm 128 mm 8*9 004720 BeCu 150mmDouble end box wrench offset Beryllium copper 150mm 150mm 10*11 019520 AlBr 150 mmDouble end box wrench offset Aluminium bronze 150 mm 150 mm 10*11