I bought these because I only needed two packs of Blum for my project and didn't want to buy another 6 packs of Blum. I didn't want to buy any extras as I didn't know if I would be going back to 14 inch boxes. Well I didn't save any money. Gliding is hard and they don't have a pull to close. Sometimes they work. In most cases I have to insert them. If I decide it's worth getting the boxes working, my other six are working fine, then all I have to do is take those two out and reinstall a different brand.