1.Suit for 115-125mm (4.5"-5") angle grinder 2.You can accurately cut 45° edge with this device 3.The device can be moved around the table to easliy cut the entire side; 4.The device can be moved back and forth to achieve different thickness of cutting. 5.Cutting direction with suction pipe to connect with vacuum cleaner ,it can achieve dust-free cutting. 6.Main material:Iron sheet.