The PR-13 Chapman Mini Ratchet. Get the famous aluminum Chapman palm ratchet hand tool. Its premium quality design provides about 200 in lbs of torque with a 20 tooth gear and an 18 degree working arc, effective on every situation and designed for working in tight spaces. This reliable offset ratchet measures 1.75" in diameter and .450" wide with 1/4" hex drive. Ratchet gear is milled from USA aluminum and heat treated with a black oxide rust inhibitor finish, hand assembled and inspected, it works with all Chapman bits: Phillips, Metric, Slotted, SAE Allen Hex, Metric Hex, and Star bits of different sizes. Simply flip over to reverse action. Pocket size, conveniently small to carry in a shirt or bag, the Chapman ratchet is designed to be used exclusively with Chapman bits. While it may fit other 1/4" Hex drive bits or extensions, it is not intended to work as a universal tool.