993 series ultramax security single cylinder deadbolt with adjustable latch - round corner latch and strike. Signature series with Smart Key technology and polished chrome finish. A contemporary square single cylinder deadbolt with smart key rekeying. Features include grade 1, round corner adjustable latch fits 2-3/8 inch and 2-3/4 inch back sets, ball bearings to prevent drill out, concealed screws, lifetime mechanical warranty, and lifetime finish warranty. Operated by key outside and thumb turn inside. Signature series dead bolts feature titanium alloy throw bolt core and ultra-strike for jamb brace. Door prep: 2-1/8 inch or 1-1/2 inch cross bore, 1 inch edge bore, 1 inch by 2-1/4 inch latch face. Door thickness: 1-3/4 inch. Includes 3 anti-pick top pins. Faceplates: 1 inch by 2-1/4 inch round corner. Strikes: 1-1/8 inch by 2-3/4 inch round corner. Includes ultra-strike door jamb brace with (3) 3 inch screws. Bolt: Brass bolt, full 1 inch throw. Titanium alloy throw bolt core. Handing: Reversible for right or left hand doors. Ansi/bhma: A156.5 grade 1. Ada: Satisfies section ada 4.13.9 requirements. Dead bolts with smartkey allow, in 3 steps, locks to be re-keyed to a spare set of keys. When the spare keys are done being used, the lock can be re-keyed back to the original set of keys; can continually be re-keyed.