MATERIAL - CARBIDE STEEL: Made of 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 - 90MM: The package includes 90mm. Guided by the circular rim, the bores all arc in any direction; ensures a true, precise and clean flat-bottomed hole with the rapid removal of waste and which ensure your work with efficiency.X-wing DESIGN FOR PRECISION: The head provides visibility and stability during operation. The center spur on each bit ensures precise drilling and prevents walking and wobbling during operation, creating perfectly round and precise holes with the center spur design. DRILLING CUTOUT HOLES: Suitable for drill press, pistol drill, drill press, vertical drill, handheld electric drill, motorized base drill and moving tape magnetism drill for mounting of; a spherical tip of door, drawer; perforation on wood 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 out of the box, so you can get the right drill bit off the shelf in seconds. Features: Dimensions: 90mm. Material: Titanium Alloy. Individual/Set: Individual. Shank Style: Straight. Tools Product Type: Power Tool Contents: 1 drill with plastic packaging."