Turns into shake sweet 5 8 to 5 16 da thread adapter Bore assistant Harness
Manfrotto XMT,002 Adapter 5/8" M10 x 20 – Thomann UK
Amazon.com: TCP Global 5/8" to 5/16" DA Thread Adapter Converts 3" to 6" Polisher Pad Backing Plates to 5/16" Threads for Dual-Action Buffers & Sanders : Automotive