I had 1155 on standard disks a bit coarse on the disks .They polish the surface of the disk with the hardness they have great stopping power if you look at 1155 and 1144 .The 1144 are thinner pad .My standard disks on the front did not last long with 1155 so i will see how the next set of 1144 go then i might go and try 1155 or somthing else