Square tenon drill square hole drilling bit

Handle type: round handle
Cooling type: (internal cooling / external cooling) external cooling
Cutting diameter (mm): 6-30mm
Shank diameter (mm): 19
Length of chip holding groove (mm): 45-70
Total length (mm): 175-230
Material: Bearing Steel
Maximum cutting depth: 230mm
Blade size: 6-30mm
Model: 6mm, 1 / 4 (6.4mm), 5 / 16 (8mm), 3 / 8 (9.5mm), 10mm, 7 / 16 (11mm), 1 / 2 (12.7mm), 4pc: 6.4mm-12.7mm, 14mm, 16mm, 18mm, 19mm, 20mm