VEVOR Shredder Blades, Alloy Steel Shredder Machine Blade Kit with 12 Rotating and 2 Fixed Blades, High-Hardness SKD-11 Blade, Compatible with Model 400 Plastic Grinder, for ABS, PP, PVC & Nylon Professional Set Sturdy & Durable Consistent Crushing Reduced Maintenance Costs Wide Applications Low Noise Operation Rotating Blades Installation Method: 2 Mounting Holes,Compatible Model: 400 Plastic Grinder,Rotating Blades: 12 pcs,Rotating Blades Mounting Hole Distance: 1.97 in/50 mm,Fixed Blades: 2 pcs,Rotating Blade Dimensions: 3.94 x 3.35 x 0.63 in/100 x 85 x 16 mm,Fixed Blade Dimensions: 15.75 x 3.15 x 0.63 in/400 x 80 x 16 mm,Surface Hardness: 50-55 HRC,Item Model Number: 400 (SKD-11),Fixed Blades Mounting Hole Distance: 2.95 in/75 mm,Fixed Blades Installation Method: 5 Mounting Holes,Net Weight: 36.16 lbs/16.4 kg,Main Material: Alloy Steel