Jerry R Simpsonville , KY January 27, 2017 Timer knob broken Ordered new knob and also knob insert which gets inserted inside of knob. The clip is like a spring clip which locks knob onto timer shaft. Just line knob "D" shaped opening to the flat on the timer shaft and push onto timer shaft. There was no reason to order the knob insert since one came already inserted in the new timer knob. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes