From Cocoknits -- 
"Forged iron snips are an ancient concept – you may have seen larger ones once used for sheep shearing. Ours are the same concept, but much smaller. 
So many snips have razor-sharp blades with plastic handles, a no-go for me. Ours are rustically forged from one piece of steel so they will never break. 
They are slim, don’t require you to unfold or get your fingers through openings, and are approved for TSA travel through security (a blade less than 3" long). 
Streamlined and good for only one thing – snipping yarn. Each snip/scissor comes with a natural vegetable-tanned leather protective cover."