Schlage F40 BWE 619 COL Collins Trim Bowery Bed and Bath Knob, Satin Nickel Use with 1-3/8 in. To 1-3/4 in. Door Push-button locking provides additional privacy Lock and finish backed by limited lifetime warranty Guaranteed to fit on existing, standard pre-drilled doors Self-aligning screw holes make installation easy and hassle-free