Lenox Hole Saw Extension, Bi-Metal, Suitable For Use With: 1 L, 2 L, 3 L Arbor, 12 in Length, 1/2 in Chuck, 1/2 in Shank, 1/2-20 and 5/8-18 Thread, 1/4 in Pilot Drill, Steel

Lenox Hole Saw Extension, Suitable For Use With: 1 L, 2 L, 3 L Arbor, 1/2 in Chuck and Larger, Steel

MK Morse Arbor Extension, Suitable For Use With: TA Hole Saw Kits, 12 in Length, 7/16 in Hexagonal Shank, High Speed Steel

Lenox Hole Saw Extension, Suitable For Use With: 1 L, 2 L, 3 L Arbor, 1/2 in Chuck and Larger, 18 in Length, 1/2 in Hexagonal Shank, Carbon Steel