Features:*100% brand new high quality*Suitable for 14mm spindle thread.*M14 Thread*Innovative design, unique self-locking structure, rotating by hand, tighten the grinding disc more powerfully*Thepackagewitha bottom pressure plate, which is more convenient to use.*Suit for:angle grinders, cutting machines, etc. with a 1200W speed of 11000r/min and a polishing disc diameter of115/125/150/180/230Specifications:*Size:As pictures show*Model: M14*Size:TopSelf-locking Pressure PlateThickness: 13mm (approximately)TopSelf-locking PressurePlate Dia :14mm(approximately)Bottom Pressure PlateThickness:3.5mm (approximately)BottomPressurePlateDia :16mm(approximately)*Color:As pictures show*Parts nut, material: 40Cr, electroplated white zinc;*Parts shell, material: ST14, carburizing and quenching, 500650HV1, electroplating white zinc;*Part back cover, material: 50#, heat treatment 4045HRC, electroplating white zinc;*Parts bracelet, material: 65Mn, heat treatment 4348HRC, blackened;Package Contents:2*TopSelf-locking PressurePlate (hole dia :14mm)2*BottomPressurePlate(hole dia :16mm)Note:1. The real color 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.