* Removes screw size:
     NO.1: 1/8"-1/4" (M3-6)
     NO.2: 1/4"-5/16" (M6-8)
     NO.3: 5/16"-7/16" (M8-11)
     NO.4: 7/16"-9/16" (M11-14)
     NO.5: 9/16"-3/4" (M14-18)
     NO.6: 3/4"-1" (M18-25)
     NO.7: 1"-1 1/8" (M25-28)
     NO.8: 1 1/8"-1 1/4"(M28-32)

     NO.9: 1 1/4"-1 7/16"(M32-36)
* Usd drill size:
     NO.1: 7/64"
     NO.2: 9/64"
     NO.3: 5/32"
     NO.4: 1/4"
     NO.5: 19/64"
     NO.6: 13/32"
     NO.7: 17/32"
     NO.8: 13/16"

     NO.9: 1 1/16"

* Made of hi-grade steel
* Heat treated