The grapple has expander pins/axles.
The grapple is optimized to be as lightweight as possible (242 kg). Similar products from competitors:
Hultdins SG 520 STD (360 kg)
Palfinger FG53 (235 kg)
Kesla PROG50 (280 kg)
Hiab KM 634 0.5 (250 kg)
Gripen 050 (310 kg)
Lasco LA2000DZ (450 kg)