Emtek's #8 Deadbolt is a keyed deadbolt with a solid-brass rosette, #8 decorative rosette; includes extension collar for thin doors. Sold as a complete set with latch and strike. Choose Single or Double Cylinder, or upgrade to the EMPowered™ 2 smart lock (Yale Access). Schlage® C keyway; solid brass cylinder, housing, collar, thumbturn & rosette Hardened steel bolt; heavy-gauge steel understrike + brass trim strike included Handing not required; ships with both 2-3/8" and 2-3/4" backset latches Standard door thickness 1-3/4"; extension collar included for thin doors Weiser® keyway available — add "W" to the product code, no upcharge EMPowered 2 smart lock (Yale Access) — note: Emtek is phasing this upgrade out Unlacquered Brass (US3NL) available at a $20 list upcharge Documentation:Download spec sheet (PDF)Download installation guide (PDF)EMPowered 2 smart-lock install & programming guide (PDF)