The best Coin Sap design - in my opinion - is the Quarter Jack. Simple design consisting of a leather tube with fold over wrap around dual snap enclosure. Just over 8" and when full a whopping 615 grams or 21.5 ozs. Approximately 3 rolls of quarters fit into the tube. The stacked coins provide some flex similar to a blackjack spring or cable. It does not look like a folded over S&M paddle like so many Coin Saps on the market and likely fool no one as to what it is for. But it is unclear to most folks that the Quarter Jack is anything but a large coin holder. It has made through courthouse security on a number of occasions. The jack has been used at full force on hard objects and does not open at the enclosure due to the fold over design. The snap buttons add a hard impact point.