Prime-Line U 9927 Keyed Sash Lock, Child-Proof Security Lock Only Unlocks w/ Key, For Aluminum, Vinyl or Wood Double-Hung Windows, 2” Hole Centers, Heavy-Duty Zinc, Brass Plated (Single Pack)

Have installed several and they are great---especially the non-removable screws! Highly recommend these. Lock when you are out of the house; unlock when in. Once installed with the non-removable screws, anybody trying to break in will have to break all the wooden panes.

It was easy to put o the window I had no issues at all and it works great. Now my four year old can't open his windows and throw out all his toys like he was doing

These are a nice lock all keyed alike however they would not fit my windows and I sent back.

Good value, fairly easy to install.

I have Anderson 400 series Double Hung windows and I needed to shim the “dummy” side upward (the side without the keyed lock) because the area in which it screws to is angled downward preventing the keyed lock mechanism side from sliding into and under the dummy side. I used small 10mm nuts between the under side of the dummy part and the wood window sash. The screws that came in the package were still long enough and worked fine. Simple fix.

works as advertised

One of these works really well, the other works for its intended purpose but the latch is loose at its base. Just not the best quality.

Bueno pro el precio