Lifetime Mechanical Warranty 5 Year Finish Warranty 5-Pin Tumbler Cylinder All exposed components are brass or stainless steel Fits doors prepared with 2 1/8" bore hole and 1" cross bore Adjustable 2 3/8" or 2 3/4" backset Fits doors from 1 3/8" - 1 3/4" thick. Optional door thickness for 2" and 2 1/4"