Square hole drill can not be used on electric drill. Square hole drill should be used with square hole drilling machine (square tenon machine). The square tenon square hole drill is composed of a sleeve outside the center of the drill. The ‘square hole drill (core 6mm)’ in the color classification on the page is only the middle core. If you have a square hole drill, you can buy it to replace it. And “square hole drill φ 10 mm” is a set: the set combination outside the drill core.

Square hole drill is made of bearing steel with hardness of 56hrc.
The diameter of clamping handle d = 19 mm. Professional wood drilling and drilling.
BOSENDA Wood drill bit/Woodworking drill/Wood square hole drill with square head ,suitable for solid wood board, particleboard, sandwich board and MDF board, as well as all kinds of cork, hardwood, plastic, rubber, polyurethane, etc.

The products has specification of precise positioning, self tapping guide bit, sharp tooth shape, smooth chip removal.With the central positioning and acceleration of thread,which make it more accurate and simple opening. The four edge cutting,which greatly improved the efficiency of opening. Four slot chip removal design, hexagonal handle, the 6.25mm handle is easy to fix and its more firmly.

(DO not drill on metal materials )
3PC：1/4″(6.4mm)、3/8″(9.5mm)、9/16″(14mm)
Package: plastic bag package size: 23 * 12 * 3cm weight: 0.57kg
4PC：1/4″(6.4mm)、5/16″(8mm)、3/8″(9.5mm)、1/2″(12.7mm)
Package: plastic bag package size: 23 * 12 * 3cm weight: 0.65kg
4PC：1/4″(6.4mm)、3/8″(9.5mm)、9/16″(14mm)、5/8″(16mm)
Package: plastic bag package size: 23 * 12 * 3cm weight: 0.85kg
5PC：1/4″(6.4mm)、5/16″(8mm)、3/8″(9.5mm)、1/2″(12.7mm)
5/8″(16mm)
Package: plastic bag package size: 23 * 18 * 3cm weight: 0.95kg
6PC：1/4″(6.4mm)、5/16″(8mm)、3/8″(9.5mm)、1/2″(12.7mm)
9/16″(14mm)、5/8″(16mm)
Package: plastic bag package size: 23 * 18 * 3cm weight: 1.1kg