SHMSL-316 | Stronghand Mag-Level 45/ 90/ 180deg. 30 KG Adjust-O Mag-Level Innovative magnets and levels with unique and updated features. The only magnetic level with the On/Off switch. Holds securely to round and flat surfaces. Three vials for 0 45 90 reading. Angles: 45 90 180 Max. Pull Force: 30 kg Dimension: 100 x 406 x 25 mm Weight: 0.9 kg * Magnetic force is based on 3/8? thick steel.