Designed For Comfort, Durability And Performance, Studio Pro High Quality Glass Tools And Accessories Are An Excellent Value And Will Quickly Become A Favorite For Any Stained Glass Project. Double Your Foiling Ease With Studio Pro Fid Pack. Contains 2 Specially Designed Plastic Fids Destined To Become Your Most Indispensable Tools. Use The Unique Rooster-Shaped Fid To Widen Lead Channels Or Burnish Foil; While The Straight Line Simplicity Of The Second Fid, Effectively Burnishes Foil For A Nice Smooth Surface, Essential For Even Solder Lines.