Protect disk lock shackle, door bracket by Ranger Lock. $11.10. Protect disk lock shackle, door bracket Lock Guards Restrictive lock cavity prevents shackle from being cut by vandals' bolt cutters and cutting tools. Sloped roofs deflect physical attack. Corrosion-resistant guard also protects lock from rain, sleet, and snow. Fully portable; install in seconds. Lock box installs in minutes. Fit most padlock brands. Lock not included unless indicated.