Features and Benefits: Quick locking due to Quick-Clamp-System High resistance to environmental influences 5/8"" thread adapter Suitable for use with: GPL 5 C; GPL 5; GPL 3; GLL 2-15; GLL 3-50; GLL 3-80 P; GLL 2-80 P; GRL 400 H; GRL 300 HVG; GRL 300 HV; GRL 500 H/HV; GOL 20 G/D; GOL 26 G/D Professional With adapter: GLL 2-50; GLM 50; GLM 80; GLM 150; GLM 250 VF Professional and all other 5/8"" fitting lasers