TOP PLATE NEEDS TO BE HEAT TREATED AND MILLED BY YOU. WILL SEND HEAT TREAT SPECS. Base is made from 1018 cold rolled. It measures 1.5” thick, 3.5x4.5. Riser plate 1018 cold rolled, 2.5” tall. 2”3”Top plate is made from heat treated D2 and measures 1” thick, 2”x3”.

Bolted together with two 1/2 20 bolts.