Gainsborough Sonata Crystal Door Knob Set (Locking Bed & Bath, Satin Nickel) Gainsborough SONATA Hand Cut European CRYSTAL Door Knob Set Available in Both Lock & Non-Locking Sets--Find Matching Bi-Fold & Dummy Knobs on Amazon Knob Measures 2 1/4 Inch Wide...On a 2  Inch Wide Round Rosette Suitable for 1 3/8 Inch Thick Door with a Standard 2 3/8 Inch Backset Gainsborough--Strength with Style--Made in Australia