Core Bit Adapter 5/8-11 Threaded Male to Spline. Please use “Rotary Mode” only when using this adapter. Dapter is made from one solid piece of steel. Easily convert 5/8-11 female arbor to. Llow you to use any tools with. Female arbor on your. Perfect accessory for your Spline hammer drill. Rush orders are welcome. We will accept return within 30 days following receipt of an item and only if the item is defective or new, unused condition. We will provide replacement orders if inventory is available and only upon request. Important Note for International Buyers. Under federal law, we cannot declare items at a lesser value or as gift. You’ll need Skype Credit. The item “2PK Core Bit Adapter 5/8-11 Threaded Male to Spline for Hammer Drill” is in sale since Wednesday, January 13, 2016. This item is in the category “Business & Industrial\Light Equipment & Tools\Drills & Hammers\Core Drills & Rigs”. The seller is “advantatools” and is located in Rowland Heights, California. This item can be shipped worldwide.