AWG 22-3/4 in. to 36-1/2 in. Adjustable Width 4-Bar Window Guard, White

Your vinyl windows should be attached to your home with studs (usually 2 x 4 or 2 x 6 depending on the thickness of your walls) on either side. When you attach these bars you want to attach them with screws that are secured by attaching the screws into the same studs. The studs on each side are only 1.5" so it may be difficult to find the studs, but usually they are within 3 inches on each side of the window. When you think you have found the stud you may confirm by pre-drilling a small hole using one of the smaller drill bits. If your bit only goes through dry wall you have not found the stud. Care should be taken that you do not hit any electrical wires or pipes. But as electrical wires, wire boxes or plumbing pipes are not normally within 3 inches of windows this is usually not a problem. However, for every rule there are always exceptions. Good luck.

No.

Ethel, Yes, 18.75 for the height. Installation codes allow for a 1" inch lift. Bringing the height to 19.75" high. Thank You, Grisham Bros.

Few minutes.

Yes

No,is for secure the house.

Outside

Strong enough

Terri, I would need to know your general location of residence to forward stocking stores for you. You can also use the HomeDepot.com site to locate stocking stores as well. Thank You, Grisham Bros