Countersink Drill Bit Set, Carpentry Woodworking Boring Tools Carpentry Reamer with Hex Key for Plastic Wood DIY Wood 3mm - 10mm(3mm)

• Drill bit is made from carbon steel and countersink is made from good quality 45# steel which ensures a long service life
• Combined drill bit and countersink bit is great for drilling, chamfering, deburring and countersinking
• There are 10 sizes of 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, 10mm and you can choose the one you need
• Five flutes design provides small chip loads and quicker removal, it can discharge wood sawdust more rapidly and smoothly
• Suitable for drilling holes on board of low hardness such as wood, plastic and other soft material

Features: Material: carbon steel (drill), 45# steel (milling) Chamfering flute: 5 Drill diameter: 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 10 mm, 3-10 mm (3/4/5/6 mm). 7/8 US / 10mm), 3-6mm (3/4/5/6mm) (optional) Cutter diameter: 15.8 mm Hex Key Size: 55 x 20mm Quantity: your choice Package includes: 1 pc (or 1 set) x chamfer drill bit 1 x Hex Wrench Note: there are only 7pcs in 3-10set, and only 4pcs in 3-6set.