Ok I've tried it on 2 "Home Security" deadbolt cylinders keyed alike, 3 "Garrison" deadbolt cylinders all keyed different, and 1 "TESA" deadbolt cylinder so 6 deadbolt cylinders in all, opened in pretty decent times, actually 2 of the Garrisons open on the first buzz immediately upon insertion

. No luck on the 2 padlocks I tried though (Master 930 & American 5200) I think theres too much movement for such small cylinders.