Makita A-90093 4-3/8-Inch 12 Tooth ATB Saw Blade with 20mm Arbor 4-3/8" Carbide-Tipped Saw Blade for general purpose cuts. Thin Kerf design for a lighter cutting load and eliminates wasted material. Precision ground teeth permit a clean cutting surface and a longer blade life. 20mm Arbor and a 13,900 maximum safe rpm speed. Fits Makita 4200NH circular saws.