Timer Knob 146MT574 Replacement for Intermatic Timer Switch Knob FD Series Spring, Spring Wound Timers - 4 Pack

These work great! Both knobs in 2 out of 3 of my bathrooms broke. Standard fan in new development neighborhood and this fit perfectly with no issues. They are holding up great.

This is good functionality.Works well and i have extras just in case.

Only one out of the bag fit tight enough to stay on the timer. Would not recommend purchasing these.

These knobs fit better than the originals

Not a tight fit but haven’t had issues with the knob falling off. Previous knobs broke and became useless.

These are nice knobs with a "D" shaped connector. They are small, and designed to fit wall timers. The plastic is very sturdy, they are cleanly molded, and the "D" section is well supported by 4 spokes to prevent breakage.Attached are photos with a blender knob for size comparison. The blender knob used a larger "D" shaped connector, similar to a stove knob. These timer knobs are smaller, and designed with a smaller "D" connector to fit wall timers.Four knobs were included in the package. The knobs are well made, and worth getting for replacing wall timer knobs.

I ordered from a different company in the past to get a replacement for my bathroom timer knob and one of their knobs was defective from the start and the other just failed because the fitting got stripped out. I ordered these for the second go around and they are a perfect fit. The plastic is also of good quality so the internal fitting will not get stripped out with regular use and they won't crack like the original knobs I had. Glad I found them.

does what it says. fits fine, looks fine, works fine. :)