Having handcuffs available for a violent encounter is a good idea. Having the ability to handcuff someone decreases the likelihood of hurting somone unnecessarily when a bunch of people pile on the suspect to hold him down. Handcuffs allow you to utilize control of the suspect with pain compliance technques if necessary.
The hidden handcuff holder is a great little device that allows you to conceal your handcuffs in your waistband, while being able to quickly and efficiently deploy them should you need them. In this video, Jack discusses how to use the hidden handcuff holder, and demonstrates how easy it is to use. He then discusses when church security personnel should use handcuffs.