Hole Saw Kit Ice Hardened Bi-Metal Ice Hardened Bi-Metal Number of Pieces 8 Teeth Variable Teeth per Inch 4/6 Use Arbor 5TJD1 Cutting Holes In Various Materials. Includes (5) Hole Saws 3/4 7/8 1 1-1/8 1-1/2 In. Twist Release Arbor with Pilot Bit Additional Pilot Bit Adapter 1/8 in Hex Key Spacer