WARRANTY - If you are not fully satisfied for any reason, please contact us for 100% refund or replacement. If the hex shank snap off, please contact us for replacement. | 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 Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets. | 13 STEP SIZE - Includes 1/8",3/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16",15/32",1/2"

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 Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets. | 3/8" SHANK - Eliminate slipping | DIMENSION - Includes from 7/8" to 1-3/8". Popular Size 7/8“, 1-1/8", 1-3/8" labeled

WARRANTY - If you are not fully satisfied for any reason, please contact us for 100% refund or replacement. If the hex shank snap off, please contact us for replacement. | STREAMLINED SIZE TRANSITION - Guarantees true smooth drilling of large holes. | TiAlN COATING- With 89HRC surface hardness, harder materials can be cut and higher cutting speeds can be achieved. | HSS STEP DRILL - Prefect for Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets. | DIMENSION - Includes 15 STEPS SIZE from 1/4" to 2-1/2". Replace a whole set of hole saw. No more suffering from drilling large holes