[Dimension]: 5 Inch/125mm diameter of the 8 hole sander pad, and 3 screw holes, the distance between screw holes is 1.41inch/36mm and the screw holes diameter 0.15inch/4mm. [Application]: Compatible withMakitaBO5010/KBO5030/KBO5031/KBO5041/KXOB01ZDeWalt DW420/420KDW421/421KDW423/423KDW426/426KD26453/26453KD26451Porter Cable 390/390K382343/343k343VSK [Features]: The sander pad has 8 holes and and 3 screw holes can be used in conjunction with a sander which have a dust collection system to effectively vacuum and remove debris. [Material]: Made of high-quality plastic material, it can ensure smooth and polishing effect, and prevents damage to disc holders. [Installation]: Easy to install, 3 mounting screw holes for quick and easy installation, with exce.