This V-Groove Drive Pulley is recommended as an OEM Replacement only. It has a hub attached and the inside diameter is Splined. This pulley does not have a keyway. There are no set screw holes. This part is Painted Black to prevent rusting. Additional Features: Made of Steel Works with 5L/B belts Splined bore; heavy duty split steel Direct OEM Replacement for: Exmark: 116-0674 Toro: 116-0674