Stanley Garage Door Opener part #24856 is the direct replacement for the original front idler piece that was previously made of plastic - this part is now metal and the kit comes complete with a new rail bracket, pulley, roll pin/fastener and the assembly itself which is round on one end to accomodate the round rail and square on the other end to fit onto the rail bracket. This kit is compatible ONLY with Stanley Chain/Cable model Garage Door Opener units. Please call our toll free help line with any questions - 866-901-1600.
