Allied Criterion CB-203D 66094 Adjustable Boring Head w/ R8 Shank R8-150018 63764. Type: CB-203D 66094 3" Adjustable Boring Head 3 / 4" Hole w / R8 Shank R8-150018 63764. Believed to be in good. Please ask all questions before purchasing. STANDARD TERMS AND CONDITIONS OF SALE. A 1-1/2% monthly service charge will be added to all balances 30 days past due. A 1-1/2% monthly service charge will be added to all balances past. You are covered by the. If you received an item that is not as described in the listing.