They have 4 Cutting edges (along the ALL edges) and have the standard 1 central hole for locating into your cutter heads
310 X 35 X 3 MM Resharpenable HSS Planer Blades Set of 2 & 3 Blades
Resawing timber for cabinet components and panel work
these blades are manufactured to the exact nominal dimensions required for the Axminster APPT255 planer/thicknesser
Equipped with a 2-inch tungsten carbide blade
Optimum Quantum SQ-V1 Bandsaw Blade 13mm (1/2") M42 Bi-Metal Blades for Metal Cutting – Pack of 3 TPI:10 TPI Constant They have 4 Cutting edgesAchieve superior cutting performance with the Optimum Quantum SQ V1 Bandsaw Blade a bi metal M42 blade precision crafted by Xcalibur Tooling for professional metal cutting. This 1140mm x 13mm (1 2") x 0. 65mm blade combines a High Speed Steel (HSS M42) tooth edge with a flexible alloy steel backing, offering exceptional durability, smooth operation, and reduced tooth breakage. Ideal for cutting mild steel, stainless steel, aluminium, copper, brass,