This is the knob for the Hobart mixer timers, Replaces part# 00-291748. it works on Hobart's standard motorized timers. Many of the mixers use it and also equipment like potato peelers, steamers, use it also. Please be sure of the part number your unit uses. Mixer models  ,A120T,A200T,D300T,D330,D340,H600T,L800T,M802,V1401 Fits timer shaft size 1/4" .250  6.30mm with flat side
If you have any questions please ask before you buy.