20PC Tin coaded HSS end mill set with wood box. 2&4 Flute 3 ... 14,18,20. Tin coaded HSS end mill set with wood box. Model No.PcsDescription181-010020 2 ... 16ths181-010310 2&4 Flute each of 1/4", 3/8", 1/2", 5/8", 3/4" 181-010420 2&4 ... 18,20mm 181-01083 2Flute 1/8", 1/4", 3/8"181-01093 4Flute 1/8", 1/4", 3/8" 181-310120 20 2 Flute ... 2 each of 3/16" to 3/4" by 16ths 20pc HSS end mill set ...