•Ribbed and sealed monobloc construction in aluminium alloy. •Stainless steel cable. •Adjustable capacity by means of a worm screw. •Auxiliary safety suspension. •Safety device against load dropping due to the spring breakage (>3kg). •Upper rotary suspension with safety hook. •Locking device to block the load at any height. •Adjustable stroke limiting device. •Taper drum rotating on ball bearings. •Cable guide in antifriction material. •Rotary upper hook with ball bearing. •Lining up upper hook. •Visible cable for inspection. •Inert spring drum assembly.
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