Lifting Magnet Maximum Flat Load Capacity 660 lb Maximum Round Load Capacity 300 lb Minimum Thickness for Activation 1/4 in Minimum Thickness for Maximum Load Capacity 1 in Activation Mechanism On/Off Handle Magnet Length 6 1/8 in Magnet Width 3 5/8 in Magnet Height 3 3/4 in Overall Length 7 1/8 in Overall Width 3 5/8 in Overall Height 3 3/4 in Bail Inside Width 1 5/8 in Bail Inside Length 2 in Handle Length 7 3/8 in Maximum Operating Temperature 176 Degrees F