Plastic Handle Ripper Stitch Unpicker Cotton Thread Craft Sewing Tool The knife material is bearing steel, good wearability and hardness, sharp blade, and good durability. Blade edge part is grinded by machine, so the blade shape and sharpness is better. Size : App 13 x 1.7cm Colour : Red Material : Bearing Steel + Plastics Package includes : 1 x Large Size Seam Ripper With Safety Cap