The MAKPAC Interlocking Case 3 Row Insert Tray Dividers, 9-pack (P-84139) is compatible with MAKPAC Interlocking Case 3 Row Insert Tray. Nine dividers provide the customizable organization of accessories when inserted into the 3-row insert tray (P-83696, sold separately). They enable customization of insert tray section and sizing and allow for easy access to commonly used accessories. It’s part of the Makita MAKPAC Interlocking Storage System.