Mac Tools offers the Mac Edge 7 Piece SAE and 8 Piece Metric Spherical Ratcheting Wrench set. The Spherical 6 in 1 drive system is Mac Tools' version of the "spline" but is enhanced by the ability to remove Trox, spline, 6pt, 12pt, square and rounded bolts. The grip technology on this drive system can remove bolts up to 50% rounded. The wrenches have a light weight aircraft-grade aluminum handle, helping reduce fatigue whil maintaining superior strength and durability. The Spherical wrenches have a Flex-Head design with 180 degree range of motion for exceptional flexibility.