Bosch Wall and Ceiling Mount for Rotary and Line Lasers WM4 SECURE: The Bosch WM4 Laser Mount positions rotary and line lasers on the wall. The WM4 mounts securely to ceiling trim using clip and clamping screw or use keyhole slots to position on wall. ADJUSTABLE: The WM4 features a vertical sliding platform with locking device and allows for 6-in height adjustment for secure and precise positioning of laser tools. VERSATILITY: The 5/8-11 thread mounting thread holds laser in position. The laser mount can be used in both horizontal and vertical positions. COMPATIBLE: The Bosch WM4 Laser Mount is designed for use with GCL 25, GLL2-80, GLL3-80, GRL300HV, GLL2-40, GRL300HVC