Compatible with Hilti, Compatible with DeWalt D28153 D28154 D28155. The size is 6.3x10x14mm, please check carefully. It has an automatic power-off function (self-stop function). When the carbon brush is worn to a certain extent, it will automatically cut off the power to effectively prevent motor damage. It is easy to replace and suitable for daily maintenance. No professional tools are required to complete the replacement. High temperature and impact resistance design, adapt to the high-frequency impact working environment of the electric hammer, stable and reliable performance., Manufacturer: EMSea