Before Installation please be sure to consult your local building code or fire department for specific codes related to installation 3 step quick relies feature for fast removal in emergencies Inside frame mounting with quick release Black painted carbon steel Designed to assist in preventing children from accidentally falling through open windows Features 3-7/8 inch bar spacing to prevent small children from an accidental fall through open windows Tamper resistant screws included to keep window grill firmly attached Please refer to the line art drawing for dimensions and compare with your needs before ordering