Diamond Products 71254 4010483 Expansion Adapter for Use Bit, 1-7/8"

Diamond Products, 71254, Expansion Adapter for Use with Open-Ended Bit, 1-7/8"

Features:

• Expansion adapters are used on open-end core bits instead of welded hubs
• Made up of two threaded plates with expansion ring
• The three pieces are placed in the core barrel and tightened on the drill rig spindle
• The expansion ring expands, and tightens against the core barrel-keeping the bit secure