Sollbry - 6Pcs Square Hole Drill Bits, Square Drill Bits, Mortise Drill Bits Carpentry Tool Square Hole Drill for Woodworking, 1/4', 5/16', 3/8',

Material: Made of carbon steel, hardness up to HRC48-50, durable and practical, heat treated, long service life. 6 different sizes: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm), 9/16" (14mm), 5/8" (16mm). This mortise and tenon chisel set is a must-have for home DIY enthusiasts. Ideal for drilling square holes in wood using a mortise machine or mortise attachment. Square hole drill bits are mainly used in woodworking. Reduce the labor intensity of construction personnel, speed up construction, and reduce construction, installation, renovation and decoration. Note: It can achieve a double effect when used in conjunction with a mortise and tenon machine. To drill square holes, you need to use tools such as electric drills and hammers. (These are not included). Note: The data are all measured manually, please allow an error of 1-3 cm. Due to differences in light and display, there may be some color differences, please refer to the actual item received.