This set consists of the following: 
8x carbon steel hole saws - 3/4", 7/8", 1-1/8", 1-1/4", 1-1/2", 1-1/3", 2", 2-1/2"
2x arbors with pilot drill 
1x Allen key
 
Delivers smooth, clean and accurate holes through wood 
Suited for cutting wood, PVC, aluminium and plastic plates