Temporarily out of stock, but can still be purchased. Amazon has the MTech USA 4.45" Fixed Blade Neck Knife (American Flag, ‎MT-20-27F) on sale for $4.99 with free shipping on $25+ or with Prime. 1.35" steel blade, includes bottle opener. Also on sale:

• MTech USA MT-588BK Grenade-Style Handle Neck Knife for $5.95.