Batman Knife with Dual Assist Open Blades Posted by Oh My! in Gadgets “Two blades for twice the cutting power. Both blades are assist-open and feature liner locks. Blades are stainless steel.” Available from Amazon – $3.17 with $4.99 Shipping – 4.5 Star Rating with over 257 Product Review. 0 Leave a Reply Cancel reply CAPTCHA Code* REQUIRED Comment Basic HTML allowed.