Comes with pieces pictured, plus a manual with a recipe for French Vanilla ice cream. I pulled out my kitchenaid mixer and assembled right away. At first, I worried because the drive attachment didn't fit as I thought it should, but it was fine once I turned it on. It doesn't "click" or do anything notable when attached. Self-explanatory how it goes together. Very important, PLAN AHEAD!! The bowl has to freeze for a full 24 hours! 
I made a sugar free vanilla ice cream. Important to use the appropriate sugar substitute (allulose). It made a lovely, creamy keto ice cream. Full of fat and flavor!! Can't recommend this attachment enough! After one time, I'm a pro. Follow the basic ice cream recipe and alter however you see fit from there. Mix-ins work great. Once it's ice cream, store in a different container, rinse and dry the bowl and put it away for next timw!