1 SPECIFICATIONS: Dimensions: 12"L x 2-1/8"W x 3/8" Thickness Bevel Angle: 34 degrees Weight: 0.22 lbs (3.6 oz) per blade Hole Configuration: 5 holes, each with a diameter of 7/16" compatible with DK2 Chippers OPC566E OPC506E OPC506 OPC504 and Power King 4", 5", and 5" Electric Start Chipper ShredderPK0915-EH PK0903 PK0915 The blade is crafted from high-strength A8 steel, boasting a hardness rating of HRC 58-62. They offer lasting sharpness and durability, with high wear and impact resistance for efficient cutting and shredding on branches and hardwood Engineered with a 34-degree bevel angle, the OPC506 blade offers increased contact area for higher cutting efficiency and reduced resistance Notice:If you have any questions or encounter any issues about product, please contact us at once