The Estwing RPEFLQBP Base Plate Replacement Kit includes two base plates compatible with the EFL50Q 2-in-1 Flooring Nailer and Stapler. This kit includes a 3/4" base plate (part 37) and a 5/8" & 9/16" base plate (part 57) for use on engineered and hardwood flooring. For parts identification, parts diagrams can be found at Prime Global Products.