Crimped Wire End Brush, Carbon Steel, 3 4 in x 0.01 in no checkout Power Blast Technology™ is a Power Blast Technology™ is a high speed blasting along the cutting edge that strengthens the blade to reduce breaks and increase durability Patented T2™ Technology reduces cutting forces on each tooth and optimizes chip removal to allow efficient cutting in the widest range of materials Patented metal cutting TPIs provide faster and more efficient cutting in the widest widest variety of materials Excellent durability Six inch metal barrel permanent marker is leak proof with a seamless metal body Heavy duty chisel felt tip with anchored nib construction Marks on wood Specifications Very flexible brushing action