The LEXIVON Impact Driver Extension Bar Set is built to professional-grade standards. PROTECT YOUR KNUCKLES ON THE JOB with our 3", 6" and 8" long impact driver extension bars set, which will make your job easier and take all the fuss out of auto repair tasks. HEAVY-DUTY TOOLS FOR PROFESSIONALS! Made from Hardened Heat-Treated Chrome Vanadium alloy steel and coated with Manganese Phosphate, our impact socket bars will pass the test of time. ACCESS HARD-TO-REACH FASTENERS WITH EASE thanks to our ergonomic and practical 3/8-inch extension bars, which are ideal for all cordless, electric, and pneumatic impact wrenches. The reliable spring-loaded detent ball will prevent dropping while the through-hole in the drive end will ensure that your extension bars are securely locked onto the drive tang.