Abstract: A tool holster includes a connector of a clip is provided for detachably securing a tool to a leg harness. A fastener stud is attachable to the tool. The holder rotatably receives the fastener stud for movements between a first angular orientation that permits the fastener stud to be selectively received and removed from the holder and a second angular orientation that prevents the fastener stud received within the holder from being separated or removed from the holder. A support member is attached to the fastener stud for sharing common rotational movements therewith and connectable to a tool to be supported. The support member is oriented to move the fastener stud to the second angular orientation only when the tool is freely suspended on the holder under the action of gravity regardless of the position or orientation of the user's leg.