All quick couplers  ( quich hitches , pin grabs) are designed to conform to ISO 13031:2016 (  Earth-moving machinery - Quick couplers - Safety ).

1.  EQC ( quick coupler with qintuple safety )

Best design for using where the occupational safety matters at most.
This coupler prevent any bucket dropping accident and lead life saving.
Mechanical safety pin and any additional devices are not necessary. 

Every workers must be

safe from hydraulic system malfunction ( failure on cylinder or valve system,  pressure loss... ).
safe from electrical system malfunction  ( short circuit, open  circuit,  Solenoid burn out , power loss...).
safe from unexpected breaking of coupler parts (  Link Pin , coupler hitch...).
safe from operator's mistake:
     -Lack of manual safety pin.
     -Unwanted/accidental deactivation of hitch engagement switch during operation.
     -Unawareness of insecurely placed hook or wedge during bucket hooking attempt.
     -Lack of the activation of engagement switch during bucket hooking attempt.

Bucket dropping accident  in various occasion.

Key mechanism

Front  lock is mechanically engaged as soon as the bucket pin is slid in.
When the activation switch is ON,  both front and rear lock engaged hydraulically.
Both front and rear locks are ready to be unlocked only when the coupler is in fully curled position.
With switching OFF, both front and rear lock are completely disengaged mechanically and hydraulically.

Key benefits

Specially designed and Patented  locking system guarantee operation safety.
Simple and unique, no additional sensing or control system required. 
The check valve for the cylinder assembly are still  functional for additional safety.
Internal space is wide enough to let aggregate or dirt go.
No additional manual safety pin is required.
2 YEAR LIMITED WARRANTY

Available type and specifications_pdf