1" TO 1/2" BLADE REDUCER BUSHING, REDUCES BLADE MOUNTING HOLE FROM 1" ID TO 1/2" ID. Mower Blade Mounting Hole Reducer, reduces mounting hole from 1" TO 1/2" 1" Outside Dimension 1/2" Inside Dimension Fits mower blades with 1" id mounting holes We sell replacement blades, belts, wheels and more for most brands of finish mowers. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Part Numbers: 1197