WTB PadLoc Lock-On Grips Description:

The WTB PadLoc lock-on grips solve one of the biggest problems in cycling: rotated grips. With PadLoc’s unique design, rotation and slippage are eliminated, and the result is a more secure and more comfortable contact point. Using a tapered inner grip cylinder that interfaces directly with PadLoc-ready handlebars to eliminate this rotation. Sold in Pairs.