hgudesign Pair of Square Hole 25mm(1") High Carbon Steel Hollow Chisel Mortisers for Woodworking and Carpentry

【SIZE】The square hole cutter measures 25mm (1") in diameter, with a cutting depth of 75mm / 2.95" and a total length of 210mm / 8.27". 【Material】Constructed from high-carbon steel, subjected to heat treatment, featuring high-hardness (48-50 HRC) bits and a -edged square chisel for durability. 【TIP AND EDGE】Equipped with an extended drill core and square chisel, facilitating easy hole locking on wood, thereby reducing worker fatigue, accelerating construction, and lowering costs. 【Application】Ideal for use with double-effect mortise and tenon machines; requires electric drills or hammers for creating square holes in wood. 【Note】Proper operation of drills or electric tools is essential to achieve square holes; failure to comply results in round holes only.