Ayp OEM Replacement Blades 340-030
Replacements/Fits 145708/152443/163819/52315443; Sears 917.251510;
Requires 3 for 46'' deck; muclching blade 
Length 15 1/2'' (393.7mm) 
Centre Hole 5 pt. star 
Width 2 1/4'' (57.2mm) 
Thickness .149'' (3.8mm)