The springs are 17 inches tall and need to compress to at least 12 inches. Outside diameter is 5 3/8" and 1/2" thick Using the compression tool with arms on the bottom instead of the open fork. Can not align the tightening rod anywhere near parallel with the spring and no where near the center of the coil. The long arm at each end is the closest arm to the coil end. Both pairs of upper and lower are aligned with each other. Tool specs is up to 5 5/8" diameter and 3/4" thick Tried two different makers with the open fork at the lower end but the spring at the open end of the fork only contacted near the top of a channel guide point Tried strut compressor but not enough clearance on the outside and will not fit on the inside. Can not compress using a hydraulic floor jack for the angle between the bottom of the coil and the lower control arm is to great.