The V-shaped trace ensures a far better quality of the repair compared to when making a ∐-shaped trace, due to the fact that the primer achieves a better spread and the adhesiveness of the filler is much better. The high concentration of diamonds and the generous size of the segments are your guaranties for extra long durability – in excess of 100 meters when tracing extra hard concrete. To be used on dry surfaces. The hand grinder must be fitted with a suitable protection shield and vacuum attachment.