Description Combatable Models: This makita 125mm chainring is suitable for Makita BO5010/KBO5030/KBO5031/KBO5041/KXOB01Z; DeWalt DW420/420KDW421/421KDW423/423KDW426/426KD26453/26453KD26451; Porter cable 390 / 390K382343 / 343k343VSK. PU Material: This sanding pad is made of high quality PU material, which is durable. Sander pad of this kind of material can guarantee excellent sanding disc smoothness and polishing effect, so as to achieve the effect of not hurting the user. Easy to Use: This 8-hole sanding disc has 3 built-in mounting screw holes and a hook and loop design, it can make installation more quick and easy and for quick sandpaper changes. Special Design: This sanding disc is designed with 8 holes, can work with sanders with dust collection system. This dust collection feature of this thumb pad is super convenient, 8 dust collection holes which effectively suck dust and debris into the dust bag assembly. Size of this sander pad: The diameter of our sanding pad is 123mm, with 8 dust holes and 3 screw holes. Before making your purchase, please make sure our sander pad fits your sander.