This set includes 10 square carbide inserts, each measuring 12x12x1.5mm with a 35° cutting bevel, making them ideal for rouging various materials like plywood, hardwood, and acrylic. Crafted from high-quality tungsten, these sharp and durable inserts offer long-lasting performance. Their 4-position rotation allows for use on all sides, significantly extending their lifespan and providing cost-effectiveness. Easy to install and remove, they are suitable for both professional carpenters and beginners, and are compatible with Genmitsu surfacing router bits, spiral planers, and wood turning tools.