Package include - 25 pcs Aluminium Oxide discs, 15 pcs nylon SiC sanding discs, 15pcs Zirconium Oxide discs, 2 pcs black strip discs, 2 pcs compressed wool discs and 1 pc 1/4" shank holder, 60 pcs in total

Nylon SiC sanding discs - open-mesh 3D structure in 3 sizes, coarse, medium and fine; the superior hardness particle provide strong and fast cutting force, enable it can work well on various of shapes surface, even the rugged one

Aluminium Oxide discs - premium aluminium oxide sandpaper with strong R-lock shank base, 5 kinds of common grit (60/ 80/ 120/ 180/ 240) to meet your various polishing requirements

Zirconium Oxide Discs - come with 3 kinds of grit (60/80/120), strong cutting force and long service life, apply for polishing hard metal, such as titanium alloy; perfect for rust removal, works well on hard surface

Unique torque spiral - the discs designed with torque spiral, which enable replace disc quickly by twisting it to remove or connect. It connect the sanding disc with the holder or tray tightly, ensure the sanding disc work steady even at high speed