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How to install countersink drill bit Step 1 -- Attach a countersink drill bit to your power bench or hand drill.and make sure the drill bit is clamped. Step 2 -- Rotate the Hex Wrench to adjust the length you need. Step 3-- Keep drill vertical 90°, get a smooth surface hole. Step 4 -- Screw cap perfect embedded in the surface of work-piece. Step 5 -- You get a beautiful, smooth hole that you want in the work-piece
Instructions: General Use -- The hole is complete when the collar stops spinning. To clean the debris cavity, hold the free-spinning stop collar in one hand and run the drill away from the work surface. The waste material will simply eject itself. Extending the Life of the Drill Bit -- To extend the life of the drill bit, drill in a straight and stable fashion. Two-handed operation is highly recommended. Drilling into dense materials can be hard work. Rest as needed and don't sacrifice stability for speed!
Dimension: 3mm(Dia) x 60mm(L) 4mm (Dia)x 75mm(L) 5mm(Dia) x 85mm(L) 6mm (Dia)x 93mm(L) 7mm(Dia) x 10mm(L) 8mm (Dia)x 11mm(L) 10mm(Dia) x 12mm(L)
Package Included: 7 x Woodworking chamfer 1 x L-wrench