The 4800 series strike is a surface mounted strike used for surface mounted rim exit devices. The 4850 1/2" thick surface mount electric strike comes with 1/4" and two (2) 1/16" spacer plates for versatility. The electric strike cavity is completely open -- which means the 4850 allows for an incremental depth up to a 1" throw. Includes Trine's patented anchoring system providing additional safety and security through a 6-pin anchoring system with the center two pins giving additional rigidity to the latch cavity. The anchoring system prevents the strike from shifting on the frame for the most secure installation. Built-in electronics automatically allow 11 thru 28 AC/DC Voltage input with surge and kickback protection. Contains a one piece locking mechanism with one solenoid, less parts mean less problems.