Interstate Pneumatics H456K 3 in 1 V-Grip Type Crimper Kit for 1/4&rdquo; 3/8&rdquo; 5/16&rdquo; 1/4&rdquo; 1/8" and 3/16" Hose I.D (H4) 3 Opening 3 Dies for 8mm, 9mm, & 11mm Hose Outer Diameter (1/8", 3/16" Hose ID) (H5) 2 Opening 2 Dies for 5/16" & 1/4" Hose - (Die Outer Diameter = 0.625" / 0.560") (H6) 2 Opening 2 Dies for 1/4 & 3/8 Hose - (Die Outer Diameter = 0. 560 / 0. 725) Made of high quality alloy steel, Nickel plated finish, Heavy duty handles One piece forged jaw for super strength, Self releasing mechanism