Kraft Tool Co.® CC970 Heavy Duty Gunite Shoes with Spikes, Adjustable. Heavy-duty, lightweight aluminum gunite shoes are a strong American made choice gunite, epoxy and other applications. Each shoe is fitted with 12 permanent steel spikes that will protect surfaces and release air bubbles. The sole plates on the shoes adjust to accommodate longer feet. A back plate on each shoe holds the foot in place to eliminate sliding. Two adjustable nylon straps securely hold the gunite sandals to the user's shoe. Wear with your work boots for a more comfortable and safer fit. One size fits most.