This lock by BALDWIn has  a SMARTKEY,RE-KEY technology.Comes with a LIFETIME WARRANTY.ITS FROM THEIR PRESTIGE SERIES.The only tool that is needed to install is a Phillips screwdriver.You can go on-line or call their number if you ned assistance while installing.Easy to install.Fits doors 35mm to44mm thick.adjustable latch 60mm to 70 mmbacksets,Comes with instructions in English and Spanish.