Global® Deluxe Water Sharpening Stone, two-sided, for honing edges, orange side is coarse (grit 240), gray side is medium (grit 1000)​​‌‌​‌​‍​​‌​‌‌‍​​‌‌‌‌​‍​​‌‌​‌‍​​‌‌​‌‌‍​​​‌‌​‍​​‌​​‌‍​​‌‌​‌​‍​‌​​‌​‍​​‌​​‌‍​​‌​​‌‍​​‌​​‌‍​​‌‌‌​‍​‌​​‌​‍​​‌​‌‌‍​​‌​​​‍​​​‌‌‌‍​​‌‌‌​‌‍​‌​​‌​‍​​​‌‌‌‍​​​‌‌‌‍​​‌‌‌​‍​​‌‌‌​‌‍​‌​​‌​‍​​‌‌​​‌‍​​‌‌​​‍​​‌‌​​‌‍​​‌​​‌‍​​‌‌‌​‍​​‌‌​‌‌‍​​‌‌​​‍​​‌‌​‌​‍​​‌​​‌‍​​‌‌‌​‌‍​​‌‌‌‌​‍​​‌‌​‌​