Steel, Classic Bronze, Interior Door Lock Lock-SetThese are classic bronze mortise lock sets with plated steel trim plates made from case hardened steel. The lock bolt is key activated from both the inside and outside. These locksets are designed for interior use only. California residents see Prop 65 WARNINGS Used for interior doors such as bedroom, bathrooms and other interior door Made from case hardened steel Classic bronze trim plates and knobs Ideal for interior doors that you want extra