More on the wrists of Molly: When Drummle shows how muscular his arm is and the other young men "fell to baring and spanning our arms in a ridiculous manner," Mr. Jaggers suddenly claps "his large hand on the housekeeper's like a trap" as she reaches across the table. "If you talk of strength," said Mr. Jaggers, "I'll show you a wrist...."
Jaggers shows the young men a wrist deeply scarred, telling them "There's power here." He explains that she has a wrist stronger than most men; the hands have a great "force of grip," as well.
Later in the novel, Pip learns what these remarkable wrists have done.