OVERVIEW Stop using kit-included allen keys or hardware store tools and equip yourself with our ProGrip wrenches. The wrenches feature tips made from HSS (High Speed Steel) blanks. The blanks are precision ground to size, then coated in Titanium Nitride (TN-coated) for strength and durability. The ProGrip handle is made from anodized aluminum with a nice diamond knurled grip surface. The 18mm O.D. handle is hollow for less weight, and also color-coded and laser etched with the measurement labels for easy and quick identification.