The Klein LL5 Long-Arm Hex Key is made from top-grade alloy steel that is heat-treated and tempered for added strength and durability. Features include: Rust and corrosion resistant surfaces. Long side for hard-to-reach applications. Short side for higher torque situations and low clearances. Short Arm Length: 11/16-Inch. Long Arm Length: 3-9/32-Inch. Hex Size: 5/64-Inch. Weight: 0.005-Pound Safety information: Always wear approved eye protection. NOT insulated - will NOT protect against electrical shock. Do NOT use a pipe or similar extension to increase leverage.