Joiner

A joiner for attaching items together, said joiner including a ring-like member having first and second ends to be linked to one another, said first end comprising a tubular section having an unbroken cylindrical distal end portion thereof for reception therein of said second end and a latching means to lock said first and second ends together, wherein said latching means includes a notch in said joiner adjacent to said second end and a lug on said tubular section which cooperates with said notch to prevent withdrawal of said second end from said tubular section, wherein an exterior contour of said lug matches an exterior contour of said tubular section to provide a smooth surface when said lug is located in said notch.