Quick view Add to Wishlist Milwaukee Electric Tool Corp. Milwaukee 48-66-3240 Chuck Key p/n 48-66-3240 MILWAUKEE® CHUCK KEY - 48-66-3240 THIS CHUCK KEY TIGHTENS THE JAWS OF THE 3/8 INCH CAPACITY CHUCK 48-66-0795 AND 48-66-0797. KEY HOLDER 48-66-4040 SHOULD BE USED TO ATTACH THIS CHUCK KEY TO THE... MSRP: $7.91 Add to Cart The item has been added