It is a 2-blade set with an inner blade leading, and can drill composite materials such as metal upholstered siding material, stainless steel upholstered wood, (metal + insulation + plywood) in one shot.
Drilling wood-based materials is good at discharging chips, so it is possible to cut nails and cut thin iron plates in layers.
Work Material: Metal Siding Board, 2 x 4 (Nails are also cut), Wood, Plywood, PVC Sheet, FRP, etc.
* For rotation only. Please do not vibrate or hit.