Staedtler Mars Drafting Dots 999172D 999 172D, Box Of 500. Dot Size 13/16". Mars Drafting Dots hold drafting media firmly in place on drafting surface. Dots come in convenient pull-tab dispenser for easy dispensing. Use these self-adhesive, repositionable dots to help you rearrange drafting media on drawing boards. Easily removed without tearing or damaging artwork. Long shelf-life and strong adhesive.