This set of four square tenon drill bits is designed for precise, clean tenon hole work in wood. Made from carbon steel with CNC-milled cutting edges, each drill bit produces smooth, sharply contoured holes – ideal for wood joints and carpentry.

The set includes four sizes – 6.4 mm, 8 mm, 9.5 mm, and 12.7 mm – covering the most common tenon hole sizes. The chip removal design reduces resistance when drilling, allowing faster, more precise cuts. Note: A drill adapter holder is required for use and sold separately.

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You will love this

• Carbon steel construction – durable cutting edge that stays sharp even with repeated use
• CNC-milled cutting edges – produce clean, smooth square tenon holes with minimal rework
• Chip removal design – reduces resistance when drilling for faster, controlled results
• Four sizes included (6.4 mm, 8 mm, 9.5 mm, 12.7 mm) – covers the most common tenon hole sizes
• Compatible with most common drills – drill adapter holder required separately

Technical data

• Material: Carbon steel
• Included sizes: 6.4 mm (1/4"), 8 mm (5/16"), 9.5 mm (3/8"), 12.7 mm (1/2")
• Scope of delivery: 4 square tenon drill bits
• Compatibility: Fits most common drills via drill adapter holder (sold separately)
• Suitable for: Wood and wood-based materials
• Notes: Drill adapter holder not included; not suitable for metal or masonry