Smith & Wesson's M&P OTF line moves to a 3.5" single edge blade with this model, trading the traditional dual edge spear point for a working edge with a stronger spine and a profile you can sharpen like a standard pocket knife.The blade rides out the front on a thumb slide and locks in both positions, the same layout that made the full size M&P OTF a range bag staple. Sized like the rest of the family with aluminum handle construction, it covers duty carry, daily cutting, and emergency use in one package.