These extremely heavy duty polished stainless steel thread clips are from the British haberdashery, Merchant & Mills. They were created in Sheffield, the home of British steel. They measure 4.5" (12cm) which makes them considerably more substantial than most thread clips (perfect for male sewers!). Their large finger ring is designed to sit on your 3rd finger so that they can hang, ever-present, in your hand as you sew. The spring action of these clips makes cutting threads quick and effortless.