These cabinet locks are very easy to use. My cabinets don't sit flush so I only needed to use one of the pieces to install. Finally I am able to stop my one (almost two) year old daughter from taking everything out of our kitchen cabinets. I was planning on screwing them in but the adhesive has been working great. I recommend softly placing them to the position you want in case you need to reposition them. Once I got them in place I pressed firmly for a few seconds and then it held great. Highly recommend this product due to it functionality, quality and value.