probst HVZ-UNI-II Operating Instructions Manual page 68

General
ATTENTION: The use of this device is only permitted in proximity to the ground.
Only stone elements with parallel and plane surface are allowed to be picked-up and handled.
Because the gripping good could fall down.
NOT ALLOWED AKTIVITIES:
Unauthorized alterations of the device and the use of any self-made additional equipment
could cause danger and are therefore forbidden!!
Never exceed the carrying capacity and the nominal width/gripping range of the device.
All unauthorized transportations with the device are not allowed:
●
Transportation of people and animals.
●
Transportation of other loads and materials than described in this
manual.
●
Never suspend any goods with ropes, chains or similar at the device.
●
Transportation of non-rectangular and round gripping goods, because
they could fall down. (see figure to the right). 
●
Gripping of gripping goods with packaging foil, because they could fall
down.
●
Transportation of material with "feet", "bellies" and "blind spacers".
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