The bigger one is a pin maul for driving spikes, bolts, and drifts.
The smaller one is a caulking mallet for driving cotton caulking between planking seams with the irons you see beside it.
The smaller one beside the pin maul is a spike set. You can hold the set with one hand and swing the maul with the other or you can do it with a partner holding the set and take a full swing.

The early bird gets the worm but its the second mouse that gets the cheese.