OOK Self-Leveling Sawtooth Hanger is designed for easy installation. This Zinc plated hanger is available in small, and large sizes to fit your picture hanging needs. This self-leveling hanger is easy to use. Simply, place hanger on back of wooden frame and gently hammer.Features Easy to use Designed for easy installation Available in small or large sizes Just place and hammer nails Great for wooden frames Materials needed: hammer Specifications Pack of 3 Zinc plated Application: Home Improvement