Splined shaft Use on blades with round center hole on riding mower & lawn tractor - 1990 to present Use with OREGON® 82-243, 82-023 and 82-250 spindles 2-5/32" dia., 5/8" splined shaft POWDERED METAL
65-204* 690411
Blade adapter Use on 42", 46", and 52" rail deck frames Use with OREGON® 82-245 spindle 2-5/32" dia., 5/8" splined ID POWDERED METAL
SEARS 65-006
AYP 850977
Blade adapter Fits all newer style walk-behind mowers 1" depth 7/8" diameter POWDERED METAL