New High-Speed Tungsten Tool Steel with EPE - Performance EdgeReplacement Blade with up to 5 times the Edge and Wear of High-Speed Steel Blades and up to 10 times the life of standard carbon steel blades.Blade size is 19 7/8" x 2 1/8" x 1/4". The blade has 7- 6mm holes with 3" spacing between holes.Also Fits all Chinese Cutters 450 mm, 17.7", 450V, 450VS, 450VS+, Models