Best used with concrete, the Hillman 3/8" J Bolt with Hex Nut can be used to suspend things off the ceiling. This steel J bolt has a coating of zinc over it and can hold on to things weighing as much as 225lbs and is an ideal addition to your toolset.Features Designed for home and farm applications Made of steel Specifications Finish: Zinc Plated Type: Nut Application: Tools and Home Improvement Length: 3-3/4" Size: 3/8-16 x 3-3/4" Color: Gray