Silicon Carbide 6" x 1/2" Round File Grit:Fine Do I need to purchase

Do I need to purchase the DVD

4" x 1 3/4" x 5/8"

SAVE compared with purchasing the stones separately

And lastly

Each stone's Aluminum Base Plate has two holes which fit on to pins on the massive Stone Stage stone holder for a stable sharpening experience

Silicon Carbide 6" x 1/2" Round File Grit:Fine Do I need to purchaseSilicon Carbide Files Silicon carbide file are ideal for fast material removal. Their abrasive nature makes them perfect for quickly performing operations like coarse sharpening, shaping, leveling, or removing burrs after machining. Silicon carbide stones are relatively fast cutting compared to aluminum oxide files, and are often employed when speed is important. Dimensions 6" x 1 2" Round Available Grits: Fine 280 Grit Medium 180 Grit Coarse 120 Grit