- 3" Stainless Steel Belt Buckle w/ Hidden Knife. - This belt buckle is 3" across and made of stainless steel. - On the back of the belt buckles is a pin and a metal belt loop. - The center of the belt buckle slides out easily with a push of the finger to reveal a closed folding knife. - The knife is 5" overall with a 2" blade. - The blade is single edged and made of stainless steel.