CONV-DW - 5/8"-11 (M) to 1-1/4"-7 F (F) - for using smaller diameter core bits threaded at 5/8"-11 on a core drill machine threaded at 1-1/4"-7. This adapter is usually required when using under 2" in diameter wet core bits or all the size of the dry core bits that have the 5/8"-11 female threaded.

CONV-WDS - 1-1/4"-11 (M) to 5/8"-11 (F) - for using larger diameter core bits threaded at 1-1/4"-7 on a grinder threaded at 5/8"-11. This adapter is usually required when using 2" to 5" in diameter wet core bits that have the 1-1/4"-7 female threaded.

CONV-WDB - 1-1/4"-11 (M) to 5/8"-11 (F) - for using larger diameter core bits threaded at 1-1/4"-7 on a grinder threaded at 5/8"-11. This adapter is usually required when using 6" to 14" in diameter wet core bits that have the 1-1/4"-7 female threaded.