These Snap Posts are used together with 1/8" T-Nuts and buckles (sold separately) to attach a ChinStrap to your helmet. Snap posts are engineered to work together with any brand of buckles for a more secure fit. Trusted by equipment staff at all levels of play. Sold in pairs (2) Stainless Steel Precision Machined 1/8" T-Nuts SOLD SEPARATELY Very Easy Install