Four spiral flute - four cutting blades design guarantees a faster and smoother cutting. Feels like a hot knife through butter
Tialn coating - with 89hrc surface hardness, harder materials can be cut and higher cutting speeds can be achieved
M35 cobalt hss step drill - prefect for 1/8"(3mm) thick stainless steel/metal sheet/wood/plastic/aluminum sheet/copper and other metal sheets
Quick change: The 1/4-inch hex shank fits easily and securely into all power tools to prevent slippage and shedding during rotation. Handyman or professionals ----- perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron and many other types of sheet metal (excluding steel or any other harder metal)