The QEP china markers include one red and one black grease-type pencil to mark a variety of non-porous tile and stone surfaces for accurate cutting. Since they are retractable, these markers don't need to be sharpened. Use the easy peel string to expose more marking area once it becomes dull. The marks easily wipe away for quick cleaning.

• Plastic outer material is more durable than standard china markers
• Grease type marking material in a mechanical pen mechanism
• Resistant to moisture and easily wipes off when the job is complete, keeping floors in pristine condition
• Twist end to elongate and retract
• Includes one red and one black marker for use on a variety of surface colors

• https://assets.unilogcorp.com/187/ITEM/DOC/QEP_103268220_Warranty.pdf Warranty Information