Toolant Four Spiral Flute Cobalt Step Drill Bit Set(Pro Max), 1/8″-7/8″(3Pcs) Impact Ready Unibit Step Drill Bit, 1/4 Hex Shank Step Bits for Metal, Stainless Steel, Aluminum, Wood, Plastic. If you are not fully satisfied for any reason, please for 100% or. If the hex shank snap off, please for. FOUR SPIRAL FLUTE – Four cutting blades design guarantees a faster and smoother cutting, allows swarf escape easily. 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. 34 TOTAL STEP SIZE – Includes 3 bits with 1/8″ – 1/2″, 1/4″ – 3/4″, 3/16″ – 7/8″. TOOLANT SUPERB FOUR SPIRAL STEP DRILL BIT. TOOLANT SUPERB STEP DRILL BIT – EVERY DAY WORK SMART. Cobalt High Speed Steel. TiAlN Coating VS Other Coating. 1/8″ – 7/8″ 3pcs. Number of Steps/Step Rings. M2 High Speed Steel. TOOLANT SUPERB FOUR SPIRAL FLUTE STEP DRILL BIT. 3.58 x 2.99 x 1.26 inches; 5.93 Ounces. 1/8″ – 7/8″ (3 PCS SET). Product Dimensions: 2.99 inches x 3.58 inches x 1.26 inches. Weight: 5.93 oz. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your satisfaction is guaranteed! All of our items, unless otherwise stated, will only run on 120 volts. Please check to make sure your country complies with these specifications. We will work with you to resolve any problem you may have.