Pentel Twist-Erase  EXPRESS Automatic Pencil, 0.5mm, Assorted Barrels, 3 Pack (QE415BP3M)
All-in-one refill cartridge includes 12 pre-loaded pieces of HB lead. 3 extra-long twist up erasers included for correcting needs. 0.7mm lead produces crisp, medium lines of consistent density. HB lead hardness is equivalent to a #2 wooden pencil.