Features and Benefits:

• Specially designed dual drive 
• Collar keeps wrench from slipping off
• Strong stubby design works great in tight quarters
• Bits are made of heat-treated alloy steel
• Only 1.63" in length

These specially designed dual drives allow the bits to be turned with the 1/2" square drive from end or using a 1" open end, box end or ratcheting wrench. Each bit is stamped with the driver size (10mm, 12mm, 14mm, 17mm).