If you want locking storage, you'll need to get a hard tonneau or a metal bed cap...but those are very different from a rolling bed cover (which of course cannot be locked...and why would you since someone would just cut through it).
Since I already have this cover, Thought I would may a little more deterrent.
Which tonneau do you have? My Bestop has a pull cord on each side if the tailgate that must be pulled to release the latch in the back, in order to roll it up. I just secure those inside the box and lock the gate, then the tonneau can't be rolled up without the tailgate open/down. As a matter of fact, I almost locked myself out of it a couple of weeks ago when my connecting rod clips inside tailgate came off of the handle, but I noticed the handle wasn't working before I closed it. Otherwise I would have had to cut my tonneau to get into it. Long story short, this works as a deterrent for me (I travel back and forth between Tampa and North Florida frequently) but I realize that a pocket knife is the Achilles heel of my bed security, so I keep the valuable stuff in the cab. Another option is to get lockable containers and use one of the cable style locks (I use them for my Yeti's) and lock them into the front of the bed. If you want close to 100% bed security, @Happycoop is correct- a fiberglass lid, a roll-n-lock, or something similar is what you need. If you're looking for "good enough for government work" maybe try something similar to what I do, if that's an option. At the end of the day, if someone really wants to get in, they will. Just my $.02.
Hey,
Kevin,
