Steel Blocks & upgraded u-bolt options These lowering / lifting blocks are a hot item and are welded inside and out, use grade 8 bolts for the pins and can be made in any configuration the buyer wants. They are perfect for the smallish perch's of our axle because the mounting area is flat and not hollow like most blocks. (see link below, post #33 ) They are also great for people using drop leafs because it's impossible to find smaller sized blocks that have a taper on them, and this is important when using drop leafs. I also offer them in different heights for those who's truck leans more on 1 side than the other. Get those aluminum ones out before they fail! They are available with 3 different u-bolt options too. (see below) Standard u-bolt option: 1/2" grade 3 zinc plated commonly found in main stream block kits. Come with nyloc nuts & grade 8 flat washers. Upgraded u-bolt option: 1/2" grade 5 made in the USA, custom bent & come w/grade 8 hardware (nyloc nuts & flat washers) Monster option: 9/16" grade 8 made in the USA, custom bent & come w/grade 8 hardware (grade 8 tall nuts & thick flat washers.) great for turbo trucks. PM Beefed for details. http://www.customtacos.com/forum/showthread.php?t=123745