Made for wire loop large buckets with a cheap handle that breaks off with normal use.
The gap is about 1mm wide but i tried it on a 2mm wire and a 3/16" wire and both worked. It is 76 mm long which is about the same as most bucket handles.
Use a brim of at least 4mm to keep build plate adhesion to the end. 100% infill recommended because leaving it hollow allows for more flexing which might let it snap.