[ MATERIALS] - The main part of this pocket hole jig is made of Metal. Anodized red surface, keep excellent finish, corrosion resistance and durability. The drill holes of this pocket hole jig are inlaid with steel drill sleeves, so there is no need to worry about it being worn during drilling, causing the guide holes to become larger and lose accuracy. [SELF CLAMP] - Our pocket hole jig with self tighten clamp function, convenient to fixing drill guide on the wood.Fast screw clamping, convenient assembly and disassembly, and improve drilling efficiency. Save the cost of purchasing locking C-clamp and F-clamp. Increase the chip hole for fast and chip removal, saving time and effort. [METRIC AND INCH SCALE] - There are precise scales on both sides of the pocket hole fixture. The drilling depth can be adjusted according to the thickness of the board, and the holes can be quickly drilled and screws are installed. and it can be easily adjusted without using any auxiliary wrenches, saving your working time. [SPECIFICATIONS] - Maximum thickness of wood board that can be accommodated: 0.47-1.77 inch (12-45cm), drill size: 4 x 9 x 170mm, hole angle: 15. [WIDE APPLICATION] - Multi- drill guide, for drilling dowel holes and pocket holes. Adjustable scale, fits for different thickness wood board, perfect for drill pocket hole jig. Colour:blue Material:Metal Package Contents: 1 X Oblique Hole Puncher guide 1 X oblique hole drill 1 X limit ring adjustment hexagon wrench 1 X screwdriver 1 set X plastic plugs and screws