This Fretz I-1 Insert can be used to create variety of shapes in small and large projects from shimmering dimples to 4.7mm high domes. Designed to be used with the Fretz H-2 Stake Holder (not included although it is shown in the picture) insert this into the top hole of the H-2 and create shimmering dimples or use the side hole to make concave or even anticlastic shapes.   Fretz stakes are made from hardened 420-grade stainless steel with highly polished areas to prevent scratching or marring your workpiece. Made in Vietnam.