Pair of vintage pliers, US made, estate find. The CeeTeeCo. slip joint pliers is about 6 1/2" long. The pattern on the handles is either the checkerdot or checkerdot knurling, registered designs from around 1915. The Diamond Duluth N15 pliers is marked "Forged in U.S.A., and is about 5 1/2" long. Both are in good used condition.