Square Hole Drill Bits Kit - Mortising Chisel Set for Woodworking, Carpentry & DIY Projects | Perfect for Joinery, Furniture Making & Cabinet Construction

100% Brand New And High Quality.The whole heat treatment, HRC48-50, high hardness. The core is lengthened and the concentric

ity is high.With the use of the square machine, if you manually open the square hole, you need a hand drill and a hammer and

other tools Product specifications: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm). This dimension refers to the

side length of the square hole punched by the square hole drill. The cylindrical portion of the clamping portion has a diame

ter of 19 mm. The square hole drill cores are all above 210mm and belong to the elongated core. 1/4" (6.35mm) - 135g 5/16" (

.94mm) - 140g 3/8" (9.5mm) - 160g 1/2" (12.7mm) - 215 grams Package Included:4 x Woodworking Saw Mortise Chisel Drill Bit Ki