Material: made of high quality corundum, sturdy and durable for a long service life, The sharpening part is quite rough, which makes it easier to quickly sharpen the blade, which is time-saving and effortless Size:grass blade cutting edge:50 x 47mm/1.97 x 1.85inch(DL)(fits most drills), Balancer: 6 x 5cm. Packaging: 4 pieces of lawn blade sharpener in red + 1 piece Balancer. Note: the weight of a single blade is 100%. turf is 70 g. So be careful when using it! Main Features:This lawn mower knife sharpener turf can sharpen the knife easily and quickly, which will shorten the sharpening time. It saves time and energy and is a very practical tool in daily life Easy to use use, adapted ` Most electric drills and corded electric drills are suitable for most manufacturers. hand,can sharpen the blade easily and quickly,The blade compensation is designed so that it fits 99% of all center holes Ideal for sharpening clippers lawn, drilling knives, mowers, sickles, tillers, garden tools and art tools, but without serrated blades or ceramic knives