Hole Saw, High Performance, 1-1/2 x 2-3/8-In. Brand_Laitner the cross bore should be

the cross bore should be 2-1/8-inches in diameter and the edge bore should be 1-inch in diameter

One size approved to handle up to 3' vent pipe

Makes up to 48 gallons

No more flats

Features an interior locking mechanism (night lock)

Hole Saw, High Performance, 1-1/2 x 2-3/8-In. Brand_Laitner the cross bore should beDiablo, 1 1 2" x 2 3 8", hole saw, high performance hole saws deliver faster cutting performance & increased productivity, hole saw design provides ultimate cutting depth to bore deeper holes in single pass, variable tooth design for faster cuts with less vibration & tool free plug ejection for fast material removal, snap lock offers quick & easy change system with no down time, one snap lock mandrel fits all diablo hole saws, from 5 8" to 6"