Attributes . Great for Many Surfaces Including: Smooth, Rough, Rusty, or Dirty Surfaces, Marks are Rub- and Weather-resistant, Leaving a Bold, Permanent Mark, Marker Refills Eliminate Mess and Paper Waste of Grease Pencils, Saving Time and Money, Holder Maximizes Complete Use of Marker, Durable Plastic Holder Helps Prevent Breakage and Keeps Hands and Clothing Clean, Push-button Advancing Makes for Easy, One-handed Use, Convenient Clip Allows for Pocket Storage and Prevents Rolling Off Work Table . Names