Volterin Titanium Step Drill Bit Set Multiple Hole step drill bit 3-Piece Set | Total 24 Sizes | 3-12mm/4-12mm/ 4-20mm, High Speed Steel Drill Bits Set with Double Cutting Blades multiple hole sizes step drill bit set

Volterin 3Pcs 1/4 Inch Hex Shank HSS Titanium Coated Step Drill Bit Set - 3-12/4-12/4-20mmWhat is a Step Drill Bit?Step Drill Bits are the most important tool when working with metals. They work at a faster speed to make relatively neat holes. Mostly used in metalworking, they come with just one single drill bit, known as a step drill bit, with progressively sized grooves and ridges.Using Step Drill Bits for Sheet Metal WorkThe step drill bits are best used on thin materials, which fits the description of sheet metal. Sheet metal work also requires a number of different sized holes, meaning that workers would need to constantly change their drill bits. Since one step drill bit can change to a number of different sizes, time is saved by using them with sheet metal work.Using Step Drill Bits for CountersinksAnother purpose of step drill bits is to use them as countersinks. Since these are so versatile, they work very well when fastening screws and fasteners beneath a surface. When drilling holes in the opposite side of materials, the smaller bits here are perfect to do this job. This is a good technique when strengthening bolts and other attachments, as well as adding stability to various construction projects.Using Step Drill Bits for Auto Repair WorkAnother great use for step drill bits is on auto repair projects. Most auto body shops use many multi-stepped bits for car restoration projects, making it a costly and timely endeavor. However, with step drill bits, they can stick with the one bit and save time with less bits needed.The 3 Cutters Come in the Following Sizes:     4-12mm: 4mm,6mm,8mm,10mm,12mm     4-20mm: 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm     3-12mm: 3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm This compact set replaces more than 10 individual drill bits. 3Pcs 1/4 Inch Hex Shank HSS Titanium Coated Step Drill Bit Set - 3-12/4-12/4-20mm What is a Step Drill Bit? These Stepped Drill Bits for Metal are the most important tool when working with metals. They work at a faster speed to make relatively neat holes. Mostly used in metalworking, they come with just one single drill bit, known as a step drill bit, with progressively sized grooves and ridges. Features: One - to - Many Step Drill Bit Set This compact Step Drill Bit Set replaces more than 10 individual drill bits. There are Small Drill Bits (3mm) and Large Drill Bits (12mm). The split point tip increases cutting speed with self-centering and prevents walking. The two-flute design of a Step Drill Bit clears chips faster and allows particles to escape easily, smooth cutting. You can drill different sizes from small holes to big. Classic high speed steel with titanium coating for proven capability and durability. Provided with small pressure, these step drills are sharp and can easily drill perfect holes. Titanium coating can reduce friction. Wood and Metal Drill Bits - Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (The board must be smaller in thickness than the height of step drill bits) Volterin 3Pcs 1/4 Inch Hex Shank HSS Titanium Coated Step Drill Bit Set - 3-12/4-12/4-20mmWhat is a Step Drill Bit?Step Drill Bits are the most important tool when working with metals. They work at a faster speed to make relatively neat holes. Mostly used in metalworking, they come with just one single drill bit, known as a step drill bit, with progressively sized grooves and ridges.Using Step Drill Bits for Sheet Metal WorkThe step drill bits are best used on thin materials, which fits the description of sheet metal. Sheet metal work also requires a number of different sized holes, meaning that workers would need to constantly change their drill bits. Since one step drill bit can change to a number of different sizes, time is saved by using them with sheet metal work.Using Step Drill Bits for CountersinksAnother purpose of step drill bits is to use them as countersinks. Since these are so versatile, they work very well when fastening screws and fasteners beneath a surface. When drilling holes in the opposite side of materials, the smaller bits here are perfect to do this job. This is a good technique when strengthening bolts and other attachments, as well as adding stability to various construction projects.Using Step Drill Bits for Auto Repair WorkAnother great use for step drill bits is on auto repair projects. Most auto body shops use many multi-stepped bits for car restoration projects, making it a costly and timely endeavor. However, with step drill bits, they can stick with the one bit and save time with less bits needed.The 3 Cutters Come in the Following Sizes:     4-12mm: 4mm,6mm,8mm,10mm,12mm     4-20mm: 4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm     3-12mm: 3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm This compact set replaces more than 10 individual drill bits. Unique bit design with ladder structure. a step bit can be used to open holes of various sizes, means a single bit is the equivalent of a more then 1 bit. No need to replace bits when a new sized hole needs drilled.A titanium drill bit set. The Titanium Coating for Cooler Running, can effectively extend the service life of the drill bit.Suitable for the work piece 25 ° or less . Suitable for carbon plate, sheet iron, steel plate.High speed steel together with titanium coating are good for most general purpose applications, offering a combination of hardness and toughness for wear resistancePacked in a pouch, offering good protection.