Wicked Edge Pro Pack 1 with Quartz Stone Base New Ball-Joint Guide Rod System Upgraded Quartz Stone Base included (colors may vary) Adjustable Angles from 15- 30. Sharpens Knives up to 17" 2 stones each in 100, 200, 400, 600, 800 & 1000 grit plus the 3.5/5 micron Strop (4000/8000 grit) Perfect Edge Every Time; Precise Angle Control; Easy to Use. Complete Instructions included