Accurate notes during meetings and conference calls can save time and effort later. Each Office Depot Brand mechanical pencil refill writes as far as a wooden pencil, making them an easy way to make sure you always have a usable writing instrument on hand. HB lead refills deliver darker lines. 0.5 lead refill fits virtually all 0.5 mm automatic pencils. This HB lead refill pack of 3 helps ensure you're always properly supplied.