The LCN 4040XP Closer is among LCN's most durable heavy-duty closers, designed for the demands of heavy-traffic applications. With its 44% increased greater load capacity over other LCN Closers, coupled with an ultra-strong 3/4 inch journal diameter, the 4040XP Closer offers extra protection in today's toughest real-world applications. And the 4040XP is built to last, with its forged steel arm, double heat treated steel pinion, and all-weather cylinder fluid for changing conditions.