Helix Compass Lead Refills 2mm 10ct Case holds 10 leads Standard #2 lead refills can be used with most compasses lead is 2mm in diameter and 3/4 inches long Break-resistant graphite designed to withstand rigorous use Pre-sharpened chisel points Standard #2 lead ^Suitable for all Maped or Helix compasses needing replacement leads ^Small size perfect for pencil cases and desks