Wonder Pins from Clover Needlecraft. Clover Wonder Pins are a revolutionary new pin concept to temporarily hold layers of fabric together instead of safety pins and straight pins!!They are strong enough to pierce multiple layers but thin enough to go through fabric without leaving holes. Wonder Pins are great when a sturdier thinner pin is necessary to pierce thick layers without bending. No need to pick up fabric when pinning.Clover Wonder Pins are fabulous for making alterations.Pin through layers of fabric and simply push the closure down.To unpin, push down and over.