2 adjectives to describe darbie

On the occasion of my arresting one of the Russian rouble note forgers, a ruffian who would not hesitate to stick at anything, I had provided myself with several sized pairs of handcuffs, and it was not until I had obtained the very much needed assistance that I was able to find the suitable "darbies" for his wrists.

He must have regretted many times that he had mentioned to me those unfortunate darbies.

2 adjectives to describe  darbie