NO-M.A.R polymer pic rail vise clamp with not scratch delicate metal finishes Firmly grip your Pic / Weaver / Scope / Quad rail with your bench vise Fantastic for holding receivers upside down or securing multi piece quad rails for assembly Easily line up your free float fore arm with your receiver rail during barrel installation Made in USA - Satifaction Guarranteed! Customer service is our #1 priority! NO-M.A.R pic rail vise clamp securely grips any standard 7/8" rail without risking damage to the metal finish. This will provide you a quick and efficient way to hold onto a difficult to grip shape common to many platforms. When installing a barrel with a rail fore arm this clamp will keep the co-witnessed rails secured straight together while you lock down the barrel interface. This one little clamp has so many multipurpose uses you are sure to find new and effective ways to grip and hold anything with a pic rail!