Features: 1. Made of high quality alloy, the blade is extremely sharped, and resistance to cutting. 2. This product can make drilling easier without destroying raw materials. 3. Have good perforation capability, can provide you with good using effect. 4. Various types of accessories make your work simple and efficient. 5. Ideal for installing locks or knobs in doors and cabinets, or for drilling large diameter holes through tables. Specification: Condition: 100% Brand New Item Type: Hole Saw Bit Material: Alloy Hole opener Specifications: 2-1/2" (64mm), 3" (76mm), 3-1/2" (89mm), 4" (102mm), 5" (127mm) Usage: Suitable for aluminum plastic panel, wood board, downlight opening Package List: 1 * Tool box 5 * Drill bit 1 * Rod 1 * Wrench 1 * Gasket Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1、Made of high quality alloy, the blade is extremely sharped, and resistance to cutting. 2、This product can make drilling easier without destroying raw materials. 3、Have good perforation capability, can provide you with good using effect. 4、Various types of accessories make your work simple and efficient. 5、Ideal for installing locks or knobs in doors and cabinets, or for drilling large diameter holes through tables.