One New Aftermarket Replacement Lawn Mower Kit With Bolts Included Kit Contains: (3) 2-in-1 Mower Blades (3) Spindle Assemblies (12) Thread Cutting Bolts (3) Spindle Blade Nuts Fits Models That Use A Star Center Hole: Fits Cub Cadet: RZT50, RZT-L50, RZT-S50, LT1050, LTX1050, I1050, SLT1550, SLTX1050, LGT1050, LGTX1050 Fits MTD: RZT 50, ZTL7000 Fits COLUMBIA: GT5025, ZT-L50, ZTL7000 Fits TROY BILT: HORSE, BIG RED HORSE, MUSTANG RZT 50, MUSTANG XP, MUSTANG 50 XP, BIG RED GT50, TB2450, SUPER BRONCO Fits Toro: LX500, GT2100, GT2200 Fits WHITE: LT-5000, LT-950H, GT-950H, ZT-50 Tech Info: (x3) Spindle Assemblies Height: 6-1/8" x Pulley Diameter: 5-1/2" (x3) 2-in-1 Mower Blades Three Blades Required For 50" Cut Thickness: 0.149" x Length: 17-7/8" x Width: 2-1/2" Center Hole: Specially Designed Center Hole To Replace Six Point Star (x12) Thread Cutting Bolts Thread: 5/16"-18 x Length: 3/4" (x3) Spindle Blade Nuts Spindle Assembly / Jackshaft Nut. Can be used on Blade or Pulley Side Replaces Part Numbers: Spindle Assemblies 618-04125, 618-04126, 618-04126A, 912-04125, 918-04125A, 918-04125B, 918-04125B, 918-04125C, 918-04126, 918-04126A, 918-04126B 2-in-1 Mower Blades 742-04053A, 742-04053B, 742-04053C, 742-04056, 742-04056A, 742-04056B, 742-04056C, 942-04053A, 942-04053B, 942-04053C, 942-04056, 942-04056A, 942-04056C, 112-0316, 50-2138 Thread Cutting Bolts 159830, 1724491, 710-0650, 710-1260A, 112-0395 Spindle Blade Nuts 712-0417, 712-0417A, 712-0417AP, 753-05549, 912-0417A, GW-7120417A, 112-0330