One of the most effective ways to build a bench is a knock-down model with a well-designed hardware system for the legs. These bench bolts are ideal for this purpose. The solid brass nuts slide into a pre-drilled hole in the stretcher and distribute pressure to prevent breakout. The bolts are 6" (150mm) long and 1/2" (12.7mm) in diameter. The nuts are 25mm x 25mm and will fit perfectly into a 1" hole.