Crescent lock, (window lock) is widely used in plastic aluminum alloy push-pull window. The hardware pushing and pulling window open and closed is crescent lock. Because its shape likes a crescent, the industry people call it crescent lock. Crescent lock not only has the effect of open closed, but also has anti-theft function to a certain extent.

 Crescent lock appearance generally has spray paint, paint, coating, electroplating, etc. Among them the white and aluminum color are the most.

There are many styles and varieties of crescent lock. High quality crescent lock has heavy weigh in hand feeling; Appearance is smooth, no pitting; Crescent lock generally can rotate 180 degrees (some can rotate 360 degrees), crescent lock with high quality spin more flexibly and freely, spin without noise, flexibility is good; Turn to look on the back, the good crescent lock spring design.

Center for material is galvanized material, not easy to rust; Viewed from the thickness of the material, is relatively thick. Same size of the inferior crescent lock phase modulation by hand is light, small, dark appearance, open is generally not very flexible, use a long time, easy to stuck and loose open. Closing and anti-theft performance greatly abate.

 Crescent lock design has a long handle, small, oblique handle