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- No. 1 Screw Size:1/8"-1/4" (M3-M6) - Pre-Drill Diameter: 7/64"
- No. 2 Screw Size :1/4"-5/16" (M6-M8) - Pre-Drill Diameter: 9/64"
- No. 3 Screw Size :5/16"-7/16" (M8-M11) - Pre-Drill Diameter: 5/32"
- No. 4 Screw Size :7/16"-9/16" (M11-M14) - Pre-Drill Diameter: 1/4"
- No. 5 Screw Size :9/16"-3/4" (M14-M18) - Pre-Drill Diameter: 19/64"
