MATERIAL CARBIDE STEEL: Made from cemented carbide and heat treated. High hardness and heat resistant, the high temperature generated during drilling will not deform it, also wear resistant, can be used for a very long time. High concentricity, so the processing precision is high and the noise is low.LARGE SIZE VERSION - 42MM: Package includes 42mm. Guided by the circular rim, the bores all have an arc in any direction; ensures a true, precise and clean flat bottom hole with rapid waste removal and ensures your work efficiently.X-wing DESIGN FOR PRECISION: The head provides visibility and stability during operation. The central spur of each bit ensures precise drilling and prevents walking and wobbling during operation, creating perfectly round and precise holes with the central spur design. DRILL CUTTING HOLES: Suitable for drill press, pistol drill, drill press, vertical drill, hand-held electric drill, pedestal motorized drill and movable tape magnetism drill for mounting spherical tip of door, drawer; perforation on wooden products, plastic products, wood and plywood.EASY TO STORE AND SELECT: Each bit comes in its own plastic box and the size has been marked on the box, so you can get the right bit off the shelf in seconds. < p> Characteristics: Dimensions: 42 mm. Material: titanium alloy. Individual/set: individual. Shank style: straight. Tools Product type: power tool Contents: 1 drill with plastic packaging. Note: data are all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.