RS Pro L Shape Hex Key Set - 15 pieces RS Pro 15 piece hex key set of for professionals and enthusiasts. Wrenches are made from fully hardened and tempered S2 Alloy Steel. High-quality material ensures long and save operation even at the high torque. A ball point end permits an entry angle up to 25° to work in hard-to-reach areas. Features and Benefits • 15 piece ballpoint L wrench set with an excellent variety of key sizes. • Lengths of keys are fully hardened • Ball-Plus™ hex keys permit an entry angle up to 25° to work in hard-to-reach areas • Heat treated, tempered alloy steel provides high strength and resistance to rotational distortion • All hex keys are precision formed to exact dimensional tolerances for precise fit • Longer length keys for extra leverage and extended reach • Non-interference hinged caddy provides easy access to each key • Chrome finish • High Rupture Capacity: 57-61. • Key material: S2. What is it also known as? • A hex key is also known as an Allen key or Allen wrench Application Information RS Pro L shape hex key Set are DIY or professional use. Ideal if you’re assembling a large piece of furniture, taking apart equipment, or a machine. Reduces fatigue while allowing you to work more efficiently.