Milwaukee QUIK-LOK™ 24" x 3/8" Shank Hole Saw Extension is designed to fit shanks with or without a power groove, providing versatile compatibility for your cutting needs. This extension enables tool- bit changes, making your work faster and more efficient. Built to withstand tough conditions, it is impact-rated for durability, ensuring long-lasting performance on the job. Model Number: 48-28-2040