Blum's CLIP top series merges strength,simplicity, and style. This particular CLIP top hingeis self closing, with a 90° opening angle. It is designed to be used on the inside corner of a 90° bi-folding door, in combinationwith 155° or 170° hinges on the other side. Four-dimensional adjustment helps ensure that the bi-fold works perfectly. Longlasting performanceis ensured with all metal construction and rigorous testing. Sleek, eye catching design is sure to please - whether in your own home, or in a client's house.Attachment of hinge to mounting plate issimple yet strongwith Blum's CLIPthree point contact system.In combination with a wide range of mounts, the CLIP series offers a hinge for almost every application - see attachedinformation sheet for possible hinge/mount combinations and their applications. Part number B.173H7100 (mounting plate) is recommended for this hinge. Hinge-to-door attachment is screw-on (screws not included).