Features Master Lock's exclusive bump stop advanced cylinder technology to protect against bump attacks</br>Comes standard with 6 pin Schlage C cylinder</br>Meets ANSI/BHMA A156.2?? Series 4000 standards for entry sets</br>UL listed?? meets UL 3 hours fire rating</br>Cylindrical lock housing</br></br>Product Description</br></br>Commercial knob lockset.   Type entry?? satin chrome finish.  Function entry??  Grade 2 material steel for door thickness 1-3/8-inch  to 1-3/4-inch.  Backset 2-3/4-inch.   Crossbore size 2-1/8-inch. Keying different number of keys two.   Six  pins 2-3/4-inch  x 1-1/8-inch.   T-strike required.   Door thickness 1-3/8-inch  to 1-3/4-inch.   Cylinder brass?? keyway type Schlage C.   Standards ANSI/BHMA A156.2.  fire rated 3 hours. Includes 2 keys.</br><br/>http://www.amazon.com/gp/product/B00164L22Y