Last year, while our company was building a large custom home, someone got in over the weekend and stole tools from one of our subs. We were lucky the thief didn't get any of our stuff — we had ladders, staging, and some stationary shop equipment unsecured in the house, and all the usual smaller tools locked in a 14-foot trailer outside. We'd always done our best to secure things by locking and chaining them as needed, but there's really not much you can do to protect an unoccupied job site.

After a second, similar theft, I looked into getting an alarm system. There are plenty of products that will protect a trailer, but I wanted one that would also protect equipment in the building and around the site. DeWalt's Sitelock alarm system (800/433-9258, seemed to fit the bill, so we decided to buy it.

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