Our mini-quartz movements are THE standard in the industry. Whether you are a hobbyist or serious clock maker, our movement will fit your needs. Perfect for clock hands under 5” long. It runs on one "AA" battery. To choose the proper shaft length, carefully measure the thickness of the material the movement shaft will go through and find the appropriate model in the table above. Our movements will operate a second hand, but second hands are considered optional. All models have a 5/16" shaft diameter so a 3/8" mounting hole is the correct size to drill in your case. Dimensions: 2 1/8" x 2 1/8" x 5/8" Shaft length 3/16" for dials up to 1/8" Hour and minute hands (under 5") are included as well as hardware.