These 10" Tongue and Groove Pliers by Armstrong features a precision-milled undercut rib joint that provides positive interlock between two halves which eliminates separation. The jaws incorporate angled teeth which provide superior gripping power over standard style vertical teeth. A specially designed fastener ensures permanent plier assembly with smooth operation. They come with a textured black over blue double non-slip dip grips for working comfort. Manufactured from high alloy steel using the most up-to-date manufacturing process and heat treat for greater strength and durability. Meets or exceeds ASME specification B107.23M-1999.