Master 3/8" Square Drive Extension Set – Precision Engineered with Knurled Serration Grip
Unlock superior reach and torque control with our Master 3/8" Sq. Drive Extension Set, a comprehensive collection of straight extensions designed to tackle jobs of any scale. Ranging in lengths from 32mm all the way up to 1000mm, this set ensures you have the perfect extension for every scenario—from confined engine bays to deep-set fasteners in industrial applications.

Each piece in the set features our signature knurled handle with a precision-machined serration grip, offering exceptional non-slip handling, even in oily or wet conditions. The straight-profile design ensures maximum strength and torque transmission without flex, while the premium finish enhances durability and corrosion resistance.