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 3/4 in Activation Mechanism On/Off Handle Magnet Length 6 in Magnet Width 3 5/8 in Magnet Height 3 1/2 in Overall Length 7 5/8 in Overall Width 9 1/2 in Overall Height 6 1/2 in Bail Inside Width 1 3/4 in Bail Inside Length 2 7/8 in Handle Length 9 in Minimum Operating Temperature 40 Degrees F