IBC is a Canadian company that manufactures premium replacement blades and chipbreaker sets that fit Lie-Nielsen and WoodRiver hand planes. IBC blades are really nice; I use them and I recommend them. At .140 inches thick, these are one of the thickest and stiffest replacement blades on the market, significantly reducing vibration and chatter thus leading to improved performance. The steel in these is just fantastic. They keep and hold and edge longer than most other replacement blades. Each blade set comes with chip-breaker, precisely machined to mate to the blade, making the blade and chip-breaker a true matches set. If used for older Stanley or Record planes then it requires filing open the throat of the plane open for the blade to fit correctly Overall: 2" wide x 7" long blade with matched chip-breaker. Sized to fit a No. 4 and 5 hand plane. Fits Lie Nielsen, Wood River and Qiangsheng hand planes. Blade: High vanadium A-2 Steel, hardened to 60-62HRc. High carbon O-1 steel, hardened to 30-32HRc. 0.140" Thick Precision ground and polished edges. Chip-Breaker: High carbon O-1 steel, hardened to 30-32HRc. 0.125" thick Precision machined and sharpened mating edge. Precision ground polished edges. Bevels are mated to achieve a flatness tolerance of +/-0.001” along the entire width of the cutting edge.
