Milwaukee 7/32" Pilot Chuck Key is designed specifically for use with Milwaukee 1/4" capacity chucks, including models #48-66-0070, #48-66-0104, and #48-66-0230. This chuck key is essential for tightening the jaws of these chucks securely, ensuring a reliable grip on drill bits during operation. For added convenience and to prevent loss, it can be attached to the cordset using the Milwaukee key holder #48-66-4080. This durable and precise tool helps maintain the performance and safety of your Milwaukee drill setup. Model Number: 48-66-3200