Features:
* clog free
* achieve consistent surface finishing
* long polishing lifespan
* reduces burn mark on the articles by its own air-cooling action
* easily to modify, so sanding along to concaved (or convexed) surface is available
* reliable safety at high speed is obtained from careful measurement and adjustment for well-balance.
* importance of good balanced flap wheels lead to longer operation life of polishing machines
* specially reinforced inside of big flap wheel with back-up nets
* simple fixing and removing
* does not require skilled worker to handle
* overall improve polishing costs.
