Both sides of the clamp have screw-type fittings that allow you to lock, release, or tighten as needed. The boss head clamp will accept rods up to 1.9cm in diameter.
PRODUCT WARNINGS
WARNING: This product can expose you to chemicals including BPA, nickel, and lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.