Designed to smooth rough patched surfaces. The 3" round is a very aggressive 10 segment puck that easily attaches to the segment plate. Grinds down bumps and rough joints. Make sure you have magnetic plates with a hole for the post. These are post backed diamonds(post on the back of the puck opposite side of the segment)
Pack of 10 pcs
 
16 Grit is the most aggressive and 120 Grit is the most fine grit
Soft bond is for hard concrete
Medium bond is for average concrete
Hard bond is for soft concrete
 
Will work on most concrete grinding machines
Metal backed works great on Magnetic Plates 
Available in soft, medium and hard bonds
Long life and very aggressive
Life Expectancy: 27,000 - 32,000 Square Feet