-Size: 6.35mm (1/4"), 7.94mm (5/16"), 9.5mm (3/8"), 12.7(1/2")mm
-The dimension refers to the length of the square hole drilled by the square hole.
-The cylinder diameter of the clamped portion is 19mm/0.74inch.
-The square hole drilling core we sell are about 210mm, belong to longer drilling core.
-Material: Made of high speed steel, through heat processing, with high hardness drill bits, and sharp-edged square chisel, long life
Application: Used for woodworking punching
High working efficiency
With long drill core and square chisel, easy to lock the hole on the wood, then you can get different mortisers quickly. Also, it is labor saving.
Package Includes:
1 X 6.35mm (1/4") Twist Drill
1 X 7.94mm (5/16") Twist Drill
1 X 9.5mm (3/8") Twist Drill
1 X 12.7mm (1/2") Twist Drill