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[5 & 64 | 7 & 64 | 9 & 64 | 11 & 64 ]
Product features: Package includes: 4 pieces. Size of drill bits: 5/64" (approx. 0.2 cm): hole diameter is about 2 mm, it should be a tapping screw with a diameter of approx. 2.2 - 2.8 mm. 7/64" (approx. 0.28 cm): hole diameter is about 2.8 mm, it should be a tapping screw with a diameter of approx. 3-3.5 mm. 9/64" (approx. 0.36 cm): hole diameter is about 3.5 mm, it should be a tapping screw with a diameter of approx. 4-4.5 mm. 11/64" (approx. 0.44 cm): hole diameter is about 4.5 mm, it should be a tapping screw with a diameter of approx. 5-5.5 mm. Material: high speed steel drill bit and brass body with electroplating finish; adjustable drilling depth; removable drill bit for easy replacement Shank:1/4" hex (6.35mm) Product Features: Click-change mechanism with 1/4" hex shank, fast, one-handed loading and releasing bits. Spring loaded outer guide with beveled head keeps the high speed drill centered for perfect pre drilled holes. Self-centring prevents moving around. Sawdust free blockage, durable and high quality, used by professional carpenters and craftsmen.