uxcell 2 Pair Angle Grinder Inner Outer Flange Replacement for Makita 9523NB Product Name : Inner Outer Flange;Fit Model : Makita 9523NB Grinder Thread Diameter : 8.5mm / 5/16";Outer Nut Size : 8.5x 30 x 7.7mm / 0.33" x 1.2" x 0.3"(Inner Dia*Outer Dia*T) Inner Nut Size : 10 x 30 x 6mm / 0.4" x 1.2" x 0.24"(Inner Dia*Outer Dia*T);Material : Metal Color : Black , Silver Tone;Weight : 40g Package Content : 2 Pair x Inner Outer Flange(non-OEM)