There are two main styles of capping, Rotary and In-line. Both have their advantages. Rotary Cappers use chucks to apply and tighten/torque the cap onto the bottles. This style of capping typically has a greater consistency in cap application over in-line systems however are greater in cost. In-line systems are a better choice for those who need speeds under 100bpm and for those with multiple cap and/or bottle sizes. In-line Cappers can be modified to accommodate those ranges without the high cost of chucks and change parts. You can also have the best of both technologies by choosing a In-line Chuck Capper which is intermittent by design and generally only utilizes one chuck. These machines are also generally much cheaper than continuous rotary cappers however still require separate chucks and/or change parts for different bottle sizes.