【NOTE】Square hole drills need to be used with square hole drilling machines (square tenoning machines). The square hole drill bit is composed of a center drill core bit and a sharp outer drill sleeve. Using this drill bit (installed on a square ten
【SHARP AND EFFICINET】The Square Hole Drill Bit is made of High-Speed Steel.The blade is sharp and wear-resistant, the overall heat treatment (heat treatment), high hardness , long service life, the drill sleeve has a U-shaped design to facilitate t
【USAGE】 This square hole drill bit is suitable for wood, including MDF, MDF, particle board, channel wood, pine wood, basswood, etc. Note: It is not suitable for processing metal, glass, plastic, concrete, gypsum board etc.