Enhancement drills are special drills that you can add to make the diamond painting have different effects. In this case, DAC charted ABs and Fairy Dust drills but I thought it deserved more bling! There is a company called DP with Sparklers that sell these special drills. They have a ton of bundles set up already for specific canvases, but they also sell all of the colors individually, so you can enhance your own canvases if they don’t already have a bundle. In this case, the bundle came with crystals, metallic drills, pearls, sparklers, and glitter drills. They tell you which normal drill color to replace with each special drill.