12" Upholstery and Drapery Shear Long blades allow longer cuts and less strokes and wear on the hands of the craftsman or woman. stainless steel (3.7 4 mm. in thickness) and hardened up to 58+/-1 HRC. The shears are elegantly made. finished and equipped with a patented duplex interlock fastener that prevents the screw from becoming loose. The fastener is also heat treated and hardened up to 45 +/- 1 HRC. The 7000 Series is available in 8 different models 7300 12 inch Professional Shear used by upholstery and drapery professionals.A winner of the IF design award 2005.