This will fir IRModels 231a, 231c 231h 232tgsl mac aw434 aw234 matco mt1758 and basically all impacts that look like the Ingersoll Rand 231c. (this will not fit IR models 2131 or 2135 series).
Ingersoll Rand Hammer PINS For 231c 231a etc Impact Wrenches
Ingersoll Rand Hammer PINS For 2131 AND 2135ti etc Impact Wrenches Gun
INGERSOLL RAND HAMMER CAM 285B 721 GENUINE INGERSOLL RAND FITS 285A, 285B, 295
2950-724 Ingersoll Rand Hammer (1 Hammer) for I-R 2950 & 3955, Part # 2950-724
INGERSOLL RAND HAMMER CASE BUSHING 2950-541
2145-D727 INGERSOLL RAND HAMMER CASE WITH BUSHING 2145QiMAX+2155QiMAX NO GASKET