The Jet 3520B lathe is equipped with precision ground bedways and the headstock and tailstock are 13mm thick cast iron with positive cam action locking devices. The heavy duty cast iron headstock is designed to travel up and down the entire length of the bed of the lathe, which means that you can turn very large diameter work at the tailstock end of the lathe. The safety spindle lock makes it easier to remove the faceplates and chuck and the headstock, built with index lock, offers 36 index stops (10°) on the spindle. The 2-step, 10 groove Poly-V belt transmits full power from the motor to the spindle at all speeds while providing extra long belt life and smooth running. A forward and reverse switch is a useful feature, especially when sanding timbers with interlocking grain and the ergonomic handles allow easy lifting of the motor for speed range changes. Two ratios are available so that full torque can be maintained at low rpm and with electronic speed control via an inverter; you can fine tune the speed of the lathe to suit the work in hand by the turn of a knob. The magnetic remote ON/OFF switch can be positioned anywhere along the lathe bed and comparator centres for copy work are a very useful feature. The 460mm bed extension is available as an optional extra and can be attached in two positions, the lower position giving a massive 490mm(19.1/4") centre height above the extension. If you want to buy a lathe that will not need upgrading at a later date, then this lathe is a sound investment.