Brinks 4701-105 Bell Style Keyed Entry Knob, Polished Brass Brinks high quality craftsmanship, all metal construction keyed entry Bell knob in polished brass High security, pick, bump and drill resistant and comes with an anti-pry shield Fits all standard doors 1 3/8 inch to 1 3/4 inch thick Lifetime warranty for defects in material or workmanship Simple to install, internal screw guide posts, uses only a Phillips screwdriver