He's described as having a "missing hand" and a "crushed and twisted" one in its place. This is a significant detail that highlights the harsh realities of the lives of migrant workers during the Depression era.
Mice and candy the old swamper who shows george Lennie to their bunks is missing what limb?
The old swamper who shows George and Lennie to their bunks in "Of Mice and Men" is missing a hand.