This wrench kit includes three wrenches and a clothespin. The wrench sets have two 1/2” and one 7/16” for solid lifters. They are thin enough to fit those thin nuts but strong to get everything tight. The box end on one of the wrenches is sized to fit a super E floatbowl plug. With the tapered end you can pry the pushrod retaining clips off. Made out of stainless steel in Ohio, with a US made clothespin!