TR Industrial TR89132 89132 4 way Log Splitter Cross Wedge, NULL Increase the power, speed, and effectiveness of the wood splitting process Easy to install and uninstall Made of heavy-duty steel Designed for TR Industrial's log splitter (model TR89130) and not compatible with other brands Wedge inner dimension: 3-1/2 x 3-1/2 x 3 in. (side facing back of log splitter); Wing width on each side: 2-7/16 in. (toward log) & 1-1/8 in. (toward back)