A pin grabber coupler for coupling a tool to a machine, the tool including a first tool pin, the pin grabber coupler comprising: a frame that includes a hook, the hook defining a concavity having an entrance, the hook configured to receive the first tool pin in the concavity via the entrance; a secondary lock assembly disposed on the frame, the secondary lock assembly including: a lock pivotable about a pivot axis P between an unlocked SL position and a locked SL position, wherein when in the locked SL position, the lock is configured to block the first tool pin from being released from or received by the concavity, and when in the unlocked SL position the lock does not block the first tool pin from being received by the concavity of the hook or released from the hook; and a tertiary lock that extends along and is configured to pivot about the pivot axis P between an unlocked TL position and a locked TL position, the tertiary lock including: a first shoulder disposed on the pivot axis P adjacent to the secondary lock assembly; a second shoulder disposed on the pivot axis P, the second shoulder spaced apart from the first shoulder; a leg disposed between the first shoulder and the second shoulder; a tab projecting outward from the leg; a latch including a body and a catch, the body extending along the pivot axis P, the catch projecting outward from the body; a bias member disposed on the pivot axis P and configured to exert a biasing force on the tertiary lock to urge the tertiary lock to the locked TL position; and a detent extending along a rocker axis R, the detent moveable between a hold position and a release position, wherein the detent is configured to exert, when in the hold position, a holding force against the latch that is greater than the biasing force exerted by the bias member, wherein when the detent is in the release position, the holding force applied by the detent against the latch is less than the biasing force applied by the bias member. a frame that includes a hook, the hook defining a concavity having an entrance, the hook configured to receive the first tool pin in the concavity via the entrance; a secondary lock assembly disposed on the frame, the secondary lock assembly including: a lock pivotable about a pivot axis P between an unlocked SL position and a locked SL position, wherein when in the locked SL position, the lock is configured to block the first tool pin from being released from or received by the concavity, and when in the unlocked SL position the lock does not block the first tool pin from being received by the concavity of the hook or released from the hook; and a lock pivotable about a pivot axis P between an unlocked SL position and a locked SL position, wherein when in the locked SL position, the lock is configured to block the first tool pin from being released from or received by the concavity, and when in the unlocked SL position the lock does not block the first tool pin from being received by the concavity of the hook or released from the hook; and a tertiary lock that extends along and is configured to pivot about the pivot axis P between an unlocked TL position and a locked TL position, the tertiary lock including: a first shoulder disposed on the pivot axis P adjacent to the secondary lock assembly; a second shoulder disposed on the pivot axis P, the second shoulder spaced apart from the first shoulder; a leg disposed between the first shoulder and the second shoulder; a tab projecting outward from the leg; a latch including a body and a catch, the body extending along the pivot axis P, the catch projecting outward from the body; a bias member disposed on the pivot axis P and configured to exert a biasing force on the tertiary lock to urge the tertiary lock to the locked TL position; and a detent extending along a rocker axis R, the detent moveable between a hold position and a release position, wherein the detent is configured to exert, when in the hold position, a holding force against the latch that is greater than the biasing force exerted by the bias member, wherein when the detent is in the release position, the holding force applied by the detent against the latch is less than the biasing force applied by the bias member. a first shoulder disposed on the pivot axis P adjacent to the secondary lock assembly; a second shoulder disposed on the pivot axis P, the second shoulder spaced apart from the first shoulder; a leg disposed between the first shoulder and the second shoulder; a tab projecting outward from the leg; a latch including a body and a catch, the body extending along the pivot axis P, the catch projecting outward from the body; a bias member disposed on the pivot axis P and configured to exert a biasing force on the tertiary lock to urge the tertiary lock to the locked TL position; and a detent extending along a rocker axis R, the detent moveable between a hold position and a release position, wherein the detent is configured to exert, when in the hold position, a holding force against the latch that is greater than the biasing force exerted by the bias member, wherein when the detent is in the release position, the holding force applied by the detent against the latch is less than the biasing force applied by the bias member.