The AEF Elec 9 Pro Badminton Stringing machine is an advanced electronic machine with a rotational gripper. It comes standard with constant pull, knot function, pre-stretch, kgs or lbs, 3 pull speeds & 4 memory positions. Featuring Automatic Base Clamps which makes locking and unlocking the column clamps a breeze (just drop the column clamp to automatically unlock the base clamp). The smooth action badminton column clamps have 4 teeth and are designed specifically for badminton racquets. The "6 point self-centring suspension mounting system" allows for quick mounting and ample room to work under the stringbed. The side supports are controlled by the larger knob at each end of the turntable. One knob controls two side supports, bringing them in and out in sync for even distribution of pressure.