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See more product details CONFIRM CORRECT SIZE BEFORE ORDERING Please measure the pilot hole on your drill chuck to ensure you order the correct key. SKD3 Drill Chuck Key for 1/2" & 5/8" Drill Chucks .312" Pilot. Ideal for tightening and loosening jaws on a drill chuck. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.







