Description: 【Versatile Compatibility】: This drill grinding machine is for sharpenable twist bits size Dia 3/3.5/4/4.5/5/5.6/8/6.5/7/7.5/8/8.5/9/9.5/10/10.5/11/11.5/12mm. Please ensure your drill matches this specification before purchasing 【Gentle Operation Required】: For optimal performance, avoid applying excessive pressure while using the grinder. Lightly rotate the bits when you hear the grinding sound to prevent damage to both the tool and the positioning angle of the drill 【Avoid Overloading】: To maintain tool integrity, do not grind too many drill in 1 . The pp construction can handle significant use but may overheat if overloaded, potentially leading to damage 【 Pp Construction】: Crafted from quality pp, this tool offers durability for regular use 【Compact Design】: With dimensions of 7.5cmx5.8cmx5.3cm/2.95inchx2.28inchx2.09inch, this grinding machine is compact and easy to store or transport, making it an ideal addition to any workshop or toolbox setup Specification: Material: Pp Sharpenable twist bits size: Dia. 3/3.5/4/4.5/5/5.6/8/6.5/7/7.5/8/8.5/9/9.5/10/10.5/11/11.5/12mm Size Chart: 7.5cmx5.8cmx5.3cm/2.95inchx2.28inchx2.09inch Package Includes: 1 Electric Bits Sharpener Wheel Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.