Blade holder shaft support for MURRAY lawn tractor lawnmower mowers Plates: 30" 38" 40" 42" Models 30540X29D 30540X67F 30540X98B 30560X50C 30560X51C 30576X10D 30577X31B 46904x92A 46907A 30500x92A 30504x92A 30505x92A 30545x92B 30560x99A 30577x8A Length: 159 mm CODE: 100035 - 450045 ORIGINAL CODE: 491921MA - 491921 - 091921 AS