DURABILITY: - This 2 PCS drill bit extension set quick release socket adapters are made of premium high-strength chrome-vanadium steel, sturdy, wear-resistant, corrosion-resistant, withstanding high pressure; ensuring long-time use; GREAT TOOL SET FOR CONVERSION & HARD-TO-REACH SPACE: - In installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool . A useful package for conversion. Great for DIY work, household maintenance, and most general repairs, not for industrial work. Nice addition to your tool box set.DIMENSION-105 RIGHT ANGLE DRILL ATTACHMENT: - The right angle drill adapter has a standard 1/4'' Hex Shank and 1/4'' Hex Socket; Maximum torque of the angle drill adapter is 15N; Only for right angle head; Great tool for narrow and confined space; FINE WORKMANSHIP: - Excellent surface coating provides extra protection from damage against elements and substances such as oil and fluids that may come in contact with the extension bars during use.QUICK RELEASE SOCKET ADAPTER: - Socket Adapter: 1/2 Inch Square Female to 1/4 Inch Hex Female- Securely holds any 1/4" hex-shank bit; Quick-load and release mechanism provides one-handed bit loading lock; Nice conversion tool makes your drill socket bits more versatile;