Slot drills 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm slot drill 5.5mm 6mm slotdrill cobalt 6.5mm 7mm 7.5mm 8mm 8.5mm 9mm 10mm 12mm 13mm 14mm 15mm 16mm 17mm 18mm 19mm 20mm 22mm 24mm 25mm 26mm 28mm 30mm 40mm 2-flute slot drill milling drilling sinking Used for side and end cutting for key-seating milling of closed slot