The Wheeler Crowfoot Wrench allows you to work on a wide range of aftermarket handguard barrel nuts. Professional-grade hardened steel construction was crafted to stand up to the rigors of AR-15/LR308 assembly, maintenance and modification. Fits common aftermarket handguard barrel nuts for both AR-15 and AR-10 rifles Professional-grade hardened steel with black oxide finish Designed to stand up to the rigors of AR-15/LR308 assembly, maintenance and modification Compatible with XL F.A.T. Wrench or any other 1/2 inch-drive torque wrenches Order today!