The Motobilt Jeep JK Micro Rear Bumper is CNC cut and formed out of 3/16 inch plate. Four holes in bumper are to clear the hit bolts because it fits tightly to the frame. Bumper does clear factory style receiver hitch. You will have to slightly trim off the frame on the back. Only minimal trimming required in a way where if you want to change bumpers in the future, it will not hinder other bumper fitment. Ships bare metal so you can paint or powder coat the color of your choice.