The Purple Heart Bracelet Block is ideal for forming and fabrication of micro-sized anticlastic bracelets. It is intended for long term use with the C (37.607), Mini C (37.606), K (37.605) and Macro Spiculum (37.602) Hammers. Use the NC Black Bracelet Block Holder to securely hold the block in your vise without annoying slippage as you work! (Bracelet Block Holder (37.621) sold separately.) 5" L X 9/16" Thick X 15/16" H.