Every connecting bolt design until now has required the installer to become a contortionist - squeezing into a cabinet base while trying to tighten a few connector bolts. Well, you still need to crawl into the cabinet base, but these new ZipBolts install with a drive key (looks like the end of a Jacobs? chuck key) mounted in an electric drill instead of a wrench or drive spud. The drive key gear mates with a similar gear on the bolt, and through the magic of left-hand threads and a right-angle ?gear box," tightening the bolt is as simple as driving a screw. The drive key is made of hardened steel for long life. For longest life, make sure the drive key firmly engages the drive gear to avoid spinning.