14K Gold Filled Wire Protectors Wire Protectors guard all stringing material from the everyday wear and tear caused by toggles, clasps or other findings. (also known as Cable Thimbles, Stringing Thimbles, and Wire Guardians) Style: F124GF (Medium) Size: 4.5mm x 3.5mm Hole size: 0.031", approx .75mm, fit up to 21 gauge wire, thread, cord. Sold by 10 pieces/pack