Bisanzwe: DIN338
Ipfundikizo nziza, gabanya guhuza ibice, kandi utezimbere ibikoresho ubuzima cyane
Ibikoresho: HSS + Tungsten Carbide inama
Inguni: 118-135degree
Gukomera:> HRC60
Gusaba: mugukata ibikoresho bikomeye cyane, shyiramo ibyuma, ibyuma, ibyuma bikomeye