Specifications: The tile drill bit can drill faster with the spiral chip flute, and it has high hardness with high temperature quenching process. This bit is suitable for drilling copper, stainless steel, ceramic tiles, acrylic, etc. This type of drill can be installed on various machines, such as ordinary hand drills, impact drills, and rechargeable drills. Item Name: Tile Drill Bit Material: Steel Features: High Hardness, Rust Resistant, Durable Size Details: 5mm: 9cm x 0.5cm x 0.5cm/3.54" x 0.2" x 0.2" (Approx.) 6mm: 10cm x 0.6cm x 0.6cm/3.94" x 0.24" x 0.24" (Approx.) 8mm: 11cm x 0.8cm x 0.8cm/4.33" x 0.31" x 0.31" (Approx.) 10mm: 12cm x 1cm x 1cm/4.72" x 0.39" x 0.39" (Approx.) 12mm: 12.5cm x 1.2cm x 1.2cm/4.92" x 0.47" x 0.47" (Approx.) Notes: Water must be added for cooling when drilling, and the strength should be light and very gentle, especially when the drilling is about to be drilled and it should be slow and even. After use, please wipe clean the surface of the product and apply anti-rust oil to prevent rust. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Tile Drill Bit