Each angle has 4 pilot holes of different sizes for different diameter cable and lag screws This corner drilling guide can drill 30/45/90 corner holes for your wooden stair railings and deck posts White scales in 2 directions accurate positioning of the drill stand, easy alignment even in low light conditions. Laser marked guides are not easy to wear and tear, 't worry about fading or falling off after long-term use Made of high-quality aviation aluminum alloy, hard and light, easy to carry, free storage Color: Red & Gold Material: aluminium alloy Package Contents: 1 x hole punch 4 x drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.