Inserts into the SwapTop work surface to hold the sponge in place and provide lubrication to grinder bits while working.

• Sponge feeds coolant from reservoir to grinding head
• SwapTop BitSerts are designed to keep sponge in proper position while grinding
• Keeps your diamond bits lubricated for longer life
• For use with 3/4" and 1" standard grinding head, all grits
• Use in SwapTop grinder conversion kit