8MILELAKE 4pcs Square Hole Drill Bits, Woodworking Spiral Mortising Chisel Drill Bit Durable Hole Saw Kits 1/4 inch, 5/16 inch, 3/8 inch, 1/2 inch

【Square Hole Drill Bit】The square hole drill bit set is suitable for all mortising machines and drill press attachments, as well as bench drilling machines. Square holes can be drilled in wood and some composite materials.
【Durable Material】The square hole mortise chisel drill set is made of the high quality steel. After heat treatment, the tool has high hardness, firmness and durability, and the square chisel is sharp and wear-resistant. The sturdy round handle helps you stay more stable during use.
【Groove Design】The drill bits for square holes with high performance flute design geometry, combined with U-shaped edge, which can achieve excellent chip extraction and help you better improve drilling efficiency.
【Various Sizes】The woodworking mortising chisel countersink bit kit includes four different sizes: 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm) and 1/2 inch (12.7mm). These square hole drills of different specifications are commonly used in our daily life.
【 Application】The spiral woodworker hole saw kit needs to be used with mortise machine (not included). If you need to extend the square hole manually, you need to use tools such as electric drill and hammer. During use, please ensure that the board and the drill are at a 90 degree angle.

Hello,