Feature: Special design for turning the lock nuts on Thermo Viscous. Material: Ste OEM : 303-1142, 303-1143, 303-1167el 303-1142 NUT WRENCH VISCOUS FAN To loosen/tighten the viscous coupling Weight: 1.06 kg, Length: 650 mm 303-1143 HOLDING TOOL VISCOUS FAN To loosen/tighten the viscous coupling Weight: 1.39 kg, Length: 650 mm 303-1167 HOLDING TOOL VISCOUS FAN To remove/install the cooling fan Weight: 1.17 kg, Length: 650 mm