Dead Beat Escape Wheel FHS 12 to 16.5 cm is an escape wheel specifically for Dead Beat Movements 141, 151, 241, 351, 451, 1051, 1151, 1161 and 2061. Dead Beat Escape Wheel 12 to 16.5 cm is specifically for movements with a pendulum length of 12, 15 and 16.5 cm. Pendulum length is indicated on the plate of the clock, it is not the actual measurement of the pendulum.