The Stride Tool Imperial brand Kwik-Vise Hose Pinch-Off Pliers work well for radiator and heater hoses, air, water, vacuum and fuel lines. The clamping mechanism locks automatically, with no adjustment needed. Simply squeeze to lock and pull handles apart to unlock. The cushion grips offers comfort and control. Available in 3 sizes: Mini (3/4" O.D. capacity,) Standard (1-1/4" O.D.) and Large (2-1/2" O.D. capacity). Made in U.S.A.