... of black paper 2.sharply, for metal,durabile,80m/s cutting wheel for metal with 80m/s1. This kind ... high hardness and brittle .It's grain edges are sharp and it's of a certain capacity of heat-transmission, ... paper clearly, excellent surface .4.80m/s with 2 nets outside , 72m/s with 1 net inside of the disc ... metal,etc. SizeInchType1 NET2 NETSCtn Qtyspeed(m/s)R.P.Mspeed(m/s)R.P.M100*2*164*1/12*5/8T41 ...