Without hardware, doors are just pieces of wood; Kwikset makes the devices that turn those pieces into doors. Kwikset manufactures handlesets, levers, knobs, as well as deadbolts and electronic keyless entry locks for light commercial and residential use. Its products are marketed in primarily in Europe and North America under brands Kwikset, Kwikset Signature Series, and SmartSeries (including SmartCode). SmartSeries comprises several trademark electronically controlled access mechanisms. Customers are retailers, wholesalers, distributors, and jobbers; Home Depot and Lowe's are Kwikset's largest. Kwikset is part of Spectrum Brand's Hardware and Home Improvement unit.