SUMMA ROTARY KNIVES SUPER HARD METAL (SHM) Summa Decagonal Knife 500 - 9860 / Z50 / SHM-050 / compatible... 0375111000SHM050SX €42.50 LONG LIFE - Long life knife. Equivalent 500 - 9860 but with LONG LIFE. Summa Decagonal Knife SUPER HARD METAL (SHM) SHM-050 / 500 - 9860 / Z50 / 3910335 / compatible for Summa automated cutting machine. Description: Long-Life decagonal knife. Similar to Z50 for cutting at very high speed and with better performance. Thickness: 0.63 mm.... Add to cart