Features:* * Suitable for 14mm spindle thread.* M14 thread * Innovative design, unique self-locking structure, rotating by hand, tighten the grinding wheel more tightly * Packaging with bottom pressure plate, which is more convenient to use.* Suit for:Angle grinders, cutting machines, etc. with 1200W speed 11000r/min and 115/125/150/180/230 diameter polishing wheelSpecifications:* Size: as pictures show* Model: M14* Size:Bottom pressure plate thickness: 3.5mm (approx.) * Color: as pictures show*Parts nut, material: 40Cr, electroplated white zinc;*Shell parts, material: ST14, carburizing and quenching, 500 - 650HV1, white zinc electroplating;*Back part cover, material: 50#, heat treatment 40 - 45HRC, electroplating white zinc;*Bracelet parts, material: 65Mn, heat treatment 43 - 48HRC, blackened; Package Contents:1 * Upper Self-Locking Pressure Plate1 * Lower Pressure PlateNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.