Standard and Special  :

- RC80 & RC 105 standard version (standard delivered) :

track on which a ball bearing car fitted with a shackle.

Track installation : with slugs, like the housing sections

(see pict 1).

- KB80 & KB105 special version (optional) :

This KB version allows not to use the boom sheaves, often inadequate due to their small diameter and their lack of ball bearings or needles. The KB boom kit includes a ball bearing car fitted with a pivoting sheave, 2 needle bearing sheaves (1 front and 1 back) and a special end stop. (see pict 2).