The DeWALT DWMT81611T 3/8 in. Nano Mech Tool Set includes 72 tooth count ratchets which allow for a 5 degree arc swing for maneuverability in restricted areas. The knurled beauty rings help reduce slippage for hand tightening applications. This durable tool set has DirectTorque technology to help prevent rounding of fasteners and provides a strong grip. The DeWalt nano mech tool set has a full polish chrome finish for corrosion resistance. This high-quality tool set is backed with a full lifetime warranty.