Gemini Type 1 Reinforced Cut Off Wheel, 4 in dia, 1 16 in Thick, 3 8 in Arbor, 36 Grit, Aluminum Oxide ORS NASCO Mild steel welding wire that Mild steel welding wire that contains high levels of manganese and silicon which produces high quality welds when used on dirty Thicker and with the Tuff Tooth™ design for the toughest cutting applications Enhanced beam strength that reduces blade deflection and twist 8% cobalt high speed cutting edge resists higher cutting temperature An additional 30% in width of the tool steel tooth makes for stronger teeth and less tooth strippage on most difficult cutting applications Specifications Free Cut hard materials