Backstops are used for easy positioning of the part and ensuring every single piece is crimped the same way. Backstop speeds up the crimping process.
Electrical backstop comes as a standard for all FP- and CC-series machines. Electrical backstop starts the crimping cycle by pressing a part against the backstop. Electrical backstop enables holding the part with both hands.
Mechanical backstop helps positioning the part for crimping. With mechanical backstop you need to activate the crimping cycle by pressing the buttons or using the foot pedal.