69 mm (2-3/8 in.) cutting depth for 40% deeper holes in 1 pass and increased productivity required but not included snap lock plus Mandrel system includes: Mandrel, pilot bit, 5/8 in. Threaded adaptor (fits diameters 1-1/4 in. To 6 in.) and 1/2 in. Threaded adaptor (fits diameters 9/16 in. To 3-1/16 in.) 1-size fits all Mandrel fits all Diablo hole saws, from 5/8 in. To 6 in. Dia tool-free Plug Ejection for fast material removal 20x longer cutting life and 10x faster cutting in hard materials.