The Fretz F-4 Cone Stake features two tapering ends: one large and one small to form conical shapes of different sizes. You can also use the wide middle section to make concave curves in sheet metal. Fretz stakes are made from hardened 420-grade stainless steel with highly polished areas to prevent scratching or marring your workpiece. Designed for use with Fretz H-1 or VH-1 holders (shown in the picture but sold separately). Made in Vietnam.