Specification Brand : Chazcool BulletPoint1 : HSS Step Drill Bit: A classic step drill bit set made of high-speed steel material and titanium coating, used for drilling on plastic, aluminum, copper, stainless steel, and many other types of metal plates, with excellent sharpness and durability (equipped with a placement box) BulletPoint2 : 118 ° Split Tip and Double Groove design: Step bit increases cutting speed through self-centering to prevent walking, use a double groove deburring device during the drilling process to remove chips faster and allow particles to escape into clean cutting holes BulletPoint3 : Multi-hole Drill Bit: This universal single-bit stepped drill bit can replace 50 individual metal drill bits with 5 parts. Using a drill bit to drill a series of different sizes and holes without the need for replacement between drill bits is sufficient to meet all your DIY-made BulletPoint4 : Widely Used: Very suitable for drilling holes on plastic, aluminum, iron, and many other types of metal plates (not recommended for stainless steel) BulletPoint5 : Customer Satisfaction: If the packaging of the step drill bit you receive is damaged, please feel free to contact us and we are always available to assist you Color : default ItemName : Chazcool Step Drill Bit, 5PCS HSS Titanium Step Drill Bit Set, 50 Sizes (1/8" to 1-3/8"), SAE Titanium High Speed Steel Unibit, Step Drill Bit for Metal ItemPackageDimensions_Height : 16.7 centimeters ItemPackageDimensions_Length : 4.7 centimeters ItemPackageDimensions_Width : 11.4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : Chazcool PartNumber : Chazcoolog84w1z35b ProductDescription : Features: - This Item ia brand new - This set replaces 50 individual drill bits. Two-flute layout gives you faster, smoother cutting. 3-sided (TRI-FLAT) shank will not slip in your drill's chuck. Cobalt coated for smoother cooler cutting - Ti coated to reduce friction and run cooler - Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck - Automatically deburrs holes as you drill - Long Life high speed steel - Includes protective padded aluminum case - Package Size:15cm*10.5cm*4.2cm(L*W*H)