The S218 is the similiar as stringing machine S223,it’s manual control. There’s display of graducation s `cale for pounds 9 to 102 LB,the left and right arm clipping arm adjustment seperately.
The working plate can rotate 360°,easy to use ,There’s a lock to fix the working plate at any angle. Moible 6 points holding system, holding quickly and even the racket stress.
Compared with S223 ,the only difference is that the machine type is vitical, easier to operate.