The Platinum Tech 2-pc Combination Internal and External Snap Ring Pliers Set, No. PLT-99911, features a spring ratchet locking mechanism that securely holds against snap ring tension, a thumb release that allows for smooth and controlled tension release, and a cushion grip for comfort. The internal ring size ranges from 3-1/16" and 6-1/4" (78mm - 159mm), and the external ring size ranges from 3-1/2" and 6-1/2" (89mm - 165mm). The tip sizes are .120", 0 degrees, 45 degrees, and 90 degrees, and are replaceable. Made in the U.S.