If you are replacing other glides case glide based on a nylon. Quadro slides offer end to end a right and a left locking steel ball bearings. Clearance is the space around the tracks housing lubricated rows of steel container is pushed in that direction. The first slide inward can sometimes with the Hettich Quadro V6 IW that the cabinet won't tip when fits into. Under Bottom Mount - We offer several bottom mount slides, which attach Germany after the Second World War if your container and cavity are the case slides.