Extra Security that"s simple and easy to fitSash Blockers are designed to provide additional security for your doors and windows.They are easy to fit and easy to operate too- just a twist of the Jammer Arm will lock or release the sash.Specifics:Easy to use- just flick on and offVersatile- can be used on numerous windows& doors.Type:Door/Window LocksFeatures:Easy to installPackage Included:1 x LockTips 1.Due to the hand measurement, there have size error about 1-2mm 2.Please be reminded that due to lighting effects and monitor"s brightness/contrast settings etc, the color tone of the photo and the actual item could be slightly different. Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.