the full extension makes it easier

Bosch and Siemens offer two versions of the 3-schienigen statement. With and without latching or stop function
The Bosch HEZ338356 or Siemens HZ338356 are identical and have no "snap" at full draw.
The Bosch HEZ338357 or Siemens HZ338357 are also identical, but have a locking function
The full extension (or called TelescopeAbout extract as in part also used by NEFF) is a meaningful and truly useful invention, which I can recommend.
Here is for price foxes the NEFF products Z1745X2 called, which can also be used, but is less expensive and a stop function has ... ;-)
I have realized this too late, but now keep the purchased part of Bosch