Very well made. I like the unique key, and how the key can be inserted from any side. High security.
These are high security and take unique keys. Lock turning feels a bit scrapy upon arrival - could use lubrication.The elliptical design easily puts painful pressure on the wrist at the base of the thumb. Good for control, if not for comfort.The cuffs are larger in frame than standard US designs, and the range of the locking perimeters is oversize vs. US cuffs too. More of a big guy cuff.