Ruler Knob easily attaches to almost any smooth flat top ruler with its powerful clear suction cup. Makes ruler pickup and placement easy. Helps steady ruler. For best results wipe ruler and suction cup clean before use. Moisten suction cup for maximum hold.
- Made of: Plastic and PVC
- Size: 1-3/4in x 1-3/4in x 1-3/4in
- Use: Ruler Accessory