This is the Tube Cutting Guide by Estes. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
FEATURES:
- Heavy duty plastic guides slip easily onto your body and allows for precision cuts for specific lengths
- 5 guide sets are included: BT5, BT20, BT50, BT55 and BT60
REQUIREMENTS: Hobby knife 
COMMENTS:
- Due to small parts that could cause a choking hazard please keep away from children 3 years of age and younger
- For your safety and enjoyment, always follow the NAR Model Rocketry Safety Code while participating in any model rocketry activities
Used with permission, copyright 2016 Estes-Cox Corp./Tower Hobbies, Inc. Copyright 2016 Brey Corp. t/a Hobby Works.