Material Made of high quality material can withstand higher pressure not easy to damageExcellent safety High quality gas wire for increased safety health and safety in the home and baby child safetyEasy to install Made of steel wire measuring 19cm long comes with selfdrilling screws and wrenches just a screwdriver or drill to installWide range of applications Perfect for PVC aluminum wood composite doors and windows Used on doublehung pivoting and sliding windows balcony doors guest room doors etcLocked and unlocked Special limiting design provides 19cm limitation and fresh air and the window can be fully opened when the cable is pulled out at one end using the wrenchOnce the cable is in place the distance the window can be opened is limited Using the wrench you can remove the cable from one end and open the window completely New shape smooth line can be bent at will cable distance up to 185 cm Unique lock core greatly increases the security of the door lock Package includes 4 pcs