1. M42/m3 bi-metal construction for heavy duty cutting 2. Variable pitch teeth for faster, smoother cutting and less vibration 3.Cutting depth to 1-1/2"(38mm) and 1-7/8" (34-40mm) 4.Extra charge for the pilot and arbor. Packing with polly bag or packing according customer's request . With carton box and brand name.