Suicide spring perch kit to mount a 1-3/4" spring in front of a 2" round tube crossmember. The main plate centers on the tube. The spring can be mounted under or on top of the perch plate. The 2 clamp bars have holes for 3/8" bolts and eliminate the u-bolts. The clamp bars can be countersunk for flat head Allen bolts. (There is enough meat around the hole.) The bolts in the kit are good for a spring with 5 leaves. If you plan to use special bolts, just order the parts required. #212714, $55.