Prime-Line N 7370 Bi-Fold Door Knob &ndash; Wide Base and Large Diameter Door Knob For Easy Gripping, Replace Old or Unsightly Knobs, 1-11/16&rdquo; Outside Diameter, Diecast, Antique Brass Plated REPLACEMENT DOOR KNOB  Replace old, unsightly or missing door knobs on your bi-fold doors with these antique brass plated, large diameter door knobs. WIDE BASE  The wide base of this bi-fold door knob prevents crushing of a door panel when installed on hollow doors, and the large diameter allows for easy gripping. EASY INSTALLATION  Installation is quick and easy and everything needed is provided  1 door knob per package with 2 fasteners. These door knobs are used by many wardrobe door manufacturers. DURABLE  Made with zinc diecast construction and an antique brass plated finish, these door knobs are strong, durable and made to last. SIZING  This door knob has an 1-11/16 outside diameter, 1-3/8 reach and 15/16 base diameter.