Chrome Plated Steel T-handle Tire repair tools
Heavy-duty Zinc Alloy T-handle tool

Chrome Plated Steel T-handle Tire repair tools

Heavy-duty Zinc Alloy T-handle tool

For inserting pludding material typically in the form of rubber coated strands, into a tire puncture.
  
The plugging material is threaded into the open eye of a needle forming a part of the tool and
inserted into the puncture.

The inserting motion is limited by a stop free to rotate on the needle's shank, so tahat the ends of   the strand are not drawn into the puncture and the stop also limits the withdrawal of the needle.