Check the listing for details. Adjustable Spindle / Mortice bar 5/16" X 4 1/4" for Old or New Knobs / Handles. Listed at 10.59 USD. Period Door Hardware Door Knob Spindle / Knobs / Handles / Levers This sale is for 1no Spindle 2x grub screws 4 x washers Door Knob Spindle 5/16″ x 4 1/4″ This is a 5/16″ (7.93mm) door handle spindle which fits some of the old locks as well as modern locks which are 8mm. Some original locks had a very slightly smaller door knob spindles (7.6mm) and if your lock is one of these you will need to enlarge the square hole in the lock with a sharpe square file. Supplied with the dark bronze/blackish 3/16″ whitworth grub screws and washers (which fit underneath the knob to take up excessive “play”) If you may be looking for matching or large sets of Bakelite, I now have a site selling new. Search for rebornbakelite on line Any queries please mail me. If your looking for a matching Handle / Knob mail me pic and size send your requirements. As I have lots in stock not listed and will li