• Heavy-duty extension bars for use with cordless, electric and pneumatic impact wrenches
• Heat-treated Chrome-Vanadium steel--same material used to make truck transmission gears
• Set includes popular 3" & 5" extensions plus hard-to-find 10" bar in 1/2" drive
• Standard square anvils with spring-loaded steel ball-bearings to hold sockets securely
• Permanent black-oxide finish for extra-effective corrosion resistance

A must-have accessory for every professional and discerning DIY toolbox; increases the versatility of impact wrenches and sockets. One-year warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.