CL3300 Series cylindrical lever lockset. This lever is from the Vineyard Collection, and offers you a wonderful look and it is also an extra heavy-duty cylindrical lever lockset. You can definitley feel safe with the CL3300 Series. There are many amazing benefits of using this wonderfully designed lever. The CL3300 has a patented lever release for vandal resistance, solid cast levers, independent return springs to prevent lever sag, through-bolted cylindrical chassis prevents rotation and ensures proper alignment, ANSI Grade 1 certification, and trim and keying compatible with other Corbin Russwin locksets. This lockset can be used on corporate campuses, mulit-family housing, restaurants, and educational facilities.