Excellent material: This kind of clamp nut is a kind of high-strength alloy material, high-strength work will not be deformed, can withstand the high speed of 11,000 rpm, sturdy and durable, quality is guaranteed and service. life is long. Exquisite craftsmanship: The bottom is frosted and has a fine texture, which increases friction. The nut can firmly lock the grinding wheel and is not easy to slip. It is an indispensable tool accessory for cutting, grinding and brushing metal and stone. Ease of use: This collet nut has a quick lock structure, which can be tightened very firmly and is not easy to loosen. It can be tightened or loosened firmly without using a wrench. The process of use is very simple and fast. Wide range of applications: the collet nut is suitable for angle grinders and cutting machines with 1200W speed of 11000r/min and a polishing disc diameter of 125 on the market. It is widely used in industry and workshop. Note: If the torque is too large to remove, you can use