Omega Technologies' Roller Ratchets were designed as a response for the need of small ratchet wrenches that could be used in tight areas where the swing of the handle was limited by obstructions, and to have a ratchet or tool that would work with very little handle movement. Roller Ratchets satisfies both of those requirements and is used throughout the aerospace industry. Max Torque (lb./in.): 150 Square Drive: 1/4'' Height: 0.91 Width: 0.65 Length: 3.5''