Here's the link to the product:
Borders Scoring Plate Simply Scored - by Stampin' Up! Some don't realize there's clear plastic covering over the plate, so peel that off before you start using it, or it will be too slippery!
It's meant to go with the SU Simply Scored tool:
Simply Scored - by Stampin' Up! but I believe some have tried using it without it, if they can keep it from moving around.
Don't forget your double-ended stylus:
Simply Scored Stylus - by Stampin' Up!
Link to the video about the new product:
Simply Scored Borders Scoring Plate with Donna Griffith - YouTube