9-Piece Plumber's Set - Includes bi-metal hole saws, arbors, and pilot drill bit

9-Piece Electrician's Set - Includes bi-metal hole saws, arbors, and pilot drill bit

17-Piece General Purpose Set - Includes bi-metal hole saws, arbors, and pilot drill bit.

1/4" Replacement Pilot Drill for Irwin Mandrels.

Fits Hole Saws: 9/16" – 1-3/16". Removable pilot drill for easy replacement

1/2"; Fits Hole Saws: 9/16" – 1-3/16". Removable pilot drill for easy replacement

3/8"; Fits Hole Saws: 1-1/4" – 6". Removable pilot drill for easy replacement

1/2"; Fits Hole Saws: 1-1/4" – 6". Removable pilot drill for easy replacement

1/4"; Fits Hole Saws: 9/16" – 1-3/16". Removable pilot drill for easy replacement

11/16" (17 mm) Dia.; Bi-metal construction; Patented WeldTec™ 4.5/5.5 variable tooth design provides longer life and improves cutting performance.

13/16" (21 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

15/16" (24 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

3/4" (19 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

5/8" (16 mm) Dia.; Bi-metal construction; Patented WeldTec™ 4.5/5.5 variable tooth design provides longer life and improves cutting performance.

7/8" (22 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

9/16" (14 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

1" (25 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

1-1/16" (27 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

1-11/16" (43 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.

1-1/2" (38 mm) Dia.; Bi-metal construction; Variable depth gullets provide more efficient chip clearance.