The Dremel Tool EZ Lock EZ456B Bulk Pack Cut-Off Wheels are a set of 12 black wheels designed for use with corded electric rotary tools. Each wheel has a diameter of 1 1/2 inches and fits into a Dremel EZ Lock Madrel chuck, making it easy to attach and remove. These cut-off wheels are perfect for a variety of cutting and grinding tasks in the workshop or at home, providing a reliable and efficient solution for your power tool needs.