These files were originally done exclusively for Photoshop, but with the huge number of requests for a Sketch version, it only made sense that we offer it for that too.
Sketch has come a long way since its first iteration. A forthcoming update to Sketch 3 will include the assets from this file—right in the application! In the meantime, you can still download the file here for use inside of Sketch. Big thanks to the people at Bohemian Coding for integrating them and to Tyler Howarth for porting them.