Streamlined Aluminium RDM Extension Ring (Collar & Pin)

New molded metal construction, unique base design

Both sdm and rdm models include three wheels; compatible with new 4roller tack pulleys

Spectra line

Easy to thread and replace downhaul line

Hinged, easy to operate all-metal adjustment collar

The U-Joint (mast base) is a molded-metal construction for the upper part, the base includes a new, easy to use star-shape design lower part