Brushed Brass Round Cavity Sliding Door Lock with Key I MuchelnThis Brushed Brass Round Cavity Sliding Door Lock is ideal for internal doors requiring a secure lock, such as study areas and sliding door cupboards. Suitable for doors up to 50mm thick, the required cut out size through the door is 58mm. If you are replacing an existing door handle it is recommended that you check the existing cut out size on your door. When installed onto a cavity slider door which slides all the way back into the cavity, we