656629
Sizzix On the Edge Die - FILE TABS 
MSRP: $15.99

True to their name, these oh-so-edgy dies cut eye-popping edges for cards, mini books, scrapbook pages and more. On each die are one or two unique edges that can be cut on nearly any project up to 5 1/2" wide, from nearly any material, including cardstock, felt, fabric, foam, magnet, leather and craft aluminum.

Information about "On the Edge" dies begins 4 min and 47 seconds into the video "alterations 2". 

How to cut on the edge dies begins 3 min 56 seconds of video below