HTS 132J0 10Pc Diamond Hole Saw Set Wooden Box (1/4" - 2-3/8") Cutting edges are coated in 150 grit industrial diamonds 2-3/8" & 2" hole saws have a 3/8" arbor 1-1/2", 1-3/8", 1-1/4", 1", 3/4", 1/2", 3/8", & 1/4" hole saws have a 1/4" arbor Slotted & vented for improved heat diffusion Set comes in a clasped wood case