Somta HSS-Co Blue Band Jobber Drill Set 1.0–13.0mm x 0.5mm Increments – 25 Piece Metal Case Set Straight Shank) it covers a combined boring Somta Series 107 – 1/16 - 1/2" X 1/64 Jobber Drill Set The optional setting ring 1103-200

it covers a combined boring range of 41–77mm with excellent rigidity and machining stability

based on the Whitworth thread form but with a finer pitch for improved strength and engagement

Part No: 7010600

including continuous and slight interrupted cuts

Cutting Diameter:  8 mm

Somta HSS Co Blue Band Jobber Drill Set 1.0–13.0mm x 0.5mm Increments – 25 Piece Metal Case Set Straight Shank) it covers a combined boring Somta Series 107 – 1 16 1 2" X 1 64 Jobber Drill Set The optional setting ring 1103 200 it covers a combined boring range of 41–77mm with excellent rigidity and machining stability based on the Whitworth thread form but with a finer pitch for improved strength and engagement