Hardened bottom plate for drill resistance .</br>Top and bottom bumpers for greater scratch resistance .</br>Thousands of key changes maximize key integrity .</br>Proprietary rustproofing for longer life .</br>4 pin tumbler cylinder helps prevent picking</br></br>Product Description</br></br>Dual locking levers provide extra pry resistance. Hardened bottom plate for drill resistance . Top and bottom bumpers for greater scratch resistance . Thousands of key changes maximize key integrity . Proprietary rustproofing for longer life . 4 pin tumbler cylinder helps prevent picking</br><br/>http://www.amazon.com/gp/product/B004HMCDJI