If you are looking to add a second hand to your clock movement there are a few things you need to know. The length of the sweep hand can be the same length of the minute hand if you would like, however, most of the time people like to have there sweep hand a 1/8" to a 1/4" shorter. With the 1 3/4" Black Sweep Second Hand you can trim up to a 1/4" off the tip if needed. To trim the tip off you would simply use some finger nail clippers and clip it off. This 1 3/4" Black Sweep Second Hand works with all our group "A" clock movements.