GearWrench 3943 Large Pro Swivoil Filter Wrench The GearWrench 3943 Large Pro Swivoil Filter Wrench features 180° swivel action, cushion grip dual material handle that provides greater comfort, and stainless and plated steel material band for lifetime corrosion resistance. Another feature on the GearWrench 3943 Large Pro Swivoil Filter Wrench is a dimpled handle for extra gripping power, and is specially designed to fit today’s oil filters.