Excerpt from Popular Mechanics: Shop Notes, Volume 3,
Hammer With Lubricant Compartment
In driving wire nails into hard wood they are not so apt
to bend if lubricated with soap. A good way to have the soap
always on hand for this purpose is to bore a hole in the end
of the hammer handle, as illustrated, and fill it with soap.
In driving small brads into hard wood this will be found particularly
—Contributed by J. Weldon, 433 Columbia St., Brooklyn,