FootFitter Cast Iron Ball & Ring Bunion Shoe Stretcher Spot Stretching Device BUNION STRETCHING: Designed to tackle specific areas of the shoe that need relieving. PROFESSIONAL CHOICE: Bunion Stretching Tool used by the Pros! CAST IRON: Heavy duty cast iron makes for a durable, quality tool. GREAT FOR: Bunions, corns, hammertoes, and foot-related pressure points. ADJUSTABLE: Use the clamp to stretch specific areas overnight.