Narex Pair Right & Left Hand Marking Striking Notching Violin Knives 813701/813711 These knives are manufactured by highly respected tool maker in Czech Republic Blades are made from hardened and tempered high speed steel Blades are 1/2 inche wide by 1/8 inche thick and 6 1/4 inches long Blades are beveled on one side only to keep the cut absolutely tight to your rule or square. Skew is 30 degrees and bevel is 35 drgrees