Features and Benefits: Quick 1/2 turn on, 1/2 turn off Roloc disc fastening system Used to quickly remove cut cork or paper gaskets and form-in-place gasket materials prior to the assembling of power train components, engine blocks, heads, and valve covers Use with 3M roloc Disc Pad 05539 Best used on steel parts Maximum operating speed: 25,000 Quick 1/2 turn on, 1/2 turn off Roloc disc fastening systemUse with 3M Roloc Disc Pad 05539Best used on steel partsMaximum operating speed 25,0002 in. Coarse25 discs per box