At least the winner for me is the Schlage B560 and B660 Series Deadbolts.http://professional.schlage.com/products/pc_hdcp_baux.asp I find the Schlage a good choice the B560 is a Grade 2 commercial lock and the B660 is a perfect choice for a Grade 1 Lock. http://schlagelocks.wordpress.com/2009/02/18/how-are-commercial-locks-graded/ The above link will help you understand what and how the Grading system [...]

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