A device and system for closure of an opening formed in a body vessel includes a bioabsorbable grasping member and locking member. The grasping member includes grasping lingers that are radially collapsible to the closed positions by movement of the locking member over the fingers. A distal portion of the fingers is configured to grasp an outer wall portion of the body vessel surrounding the opening when the fingers are in the open position. Movement of the locking member can cause the fingers to at least substantially close the vessel opening. Structural features on the fingers and/or locking member can inhibit proximal or distal movement of the locking member when in a locking position. A detachable arm can be coupled to the grasping member to facilitate placement of the grasping member. A sheath can fit over the detachable arm and be configured to move the locking member over the fingers.