Lifting Magnet Maximum Flat Load Capacity 800 lb Maximum Round Load Capacity 400 lb Minimum Thickness for Activation 1/4 in Minimum Thickness for Maximum Load Capacity 3 in Activation Mechanism On/Off Handle Magnet Length 6 3/8 in Magnet Width 3 5/8 in Magnet Height 3 7/8 in Overall Length 7 7/8 in Overall Width 3 5/8 in Overall Height 8 7/8 in Bail Inside Width 1 3/4 in Bail Inside Length 2 3/8 in Handle Length 8 in Minimum Operating Temperature -10 Degrees F