The double-sprung tubular latch is one of the best types of tube door latches. This type of latch has a separate spring for the latch's spindle follower and tongue action, so the levers always return to their horizontal position. It also features a magnetic catch. Although the latch may be concealed

The standard backset tubular passage door latch is designed for use with square spindle door knobs. It features solid brass face plates and strike, and has heavy-duty components. It is available in a variety of finishes. The tubular latch uses a 5/16" spindle. Designed for use with standard square s