Features:
material:made of high hardness carbon steel, hole drill bit is solid, .
craft:each, went through process, has smooth surface for less friction, for better work.
design:U-shape is for the discharge of wood chips, to improve the drilling efficiency.
Various dill bits:the set contains different size drill bits, enough, satisfied for multiple demands.
Wide application:it works with mortising machine, very suitable for drilling wood, like MDF, particle board, pine wood, basswood, etc. 

Total 5 Combinations for Option
4pcs: 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm), 1/2 inch (12.7mm)
5pcs: 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm), 1/2 inch (12.7mm), 5/8 inch (16mm)
6pcs: 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm), 1/2 inch (12.7mm), 9/16 inch (14mm), 5/8 inch (16mm)
7pcs: 1/4 inch(6mm), 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm), 2/5 inch (10 mm), 1/2 inch (12.5mm), 1/2 inch (12.7mm)
7pcs: 1/4 inch (6.4mm), 5/16 inch (8mm), 3/8 inch (9.5mm), 2/5 inch (10 mm), 1/2 inch (12.7mm), 9/16 inch (14mm), 5/8 inch (16mm)

Specification:
Material: Carbon Steel
Color:
Type: 4pcs / 5pcs / 6pcs / 7pcs / 7pcs (Optional)
Package Size: 
4pcs: 22*11*3cm / 8.66*4.33*1.18in
5pcs: 22*13*3cm / 8.66**1.18in
6pcs: 22.5*8.5*5.5cm / 8.85*3.34*2.16in
7pcs: 22*13*5.5cm / 8.66**2.16in
7pcs: 22.5*13*5.5cm / 8.85**2.16in
Package Weight: 
4pcs: 670g / 23.63oz
5pcs: 910g / 32.09oz
6pcs: 1140g / 40.21oz
7pcs: 1144g / 40.35oz
7pcs: 1300g / 45.85oz

Note:
Drill bits set only, other accessories in the pictures are not included.
The bit is not suitable for processing metal, , , concrete, gypsum board etc.
Due to or other reasons, the picture and material object may slightly differ.
Due to manual measurement, there may be deviation, please in kind prevail.

Packing List:
5 * Drill Bit