Welded construction. Works with intake. Any valve spring. Put the piston at TDC. Add compressed air. Remove pushrods and go to work. Using a soft hammer hit one side of the retainer to unseat it. Handle is optional. $25.00. Except for the strongest springs a long extension and a deep well socket works quite well. IT COMES UNPAINTED.I recommend a coat of light oil. Adding paint invites paint chipping.  Complete instructions included. Satisfaction guaranteed .

I figure freight at $12.00. I will refund the difference.