Lifting Magnet Maximum Flat Load Capacity 250 lb Maximum Round Load Capacity 125 lb Minimum Thickness for Activation 1/4 in Minimum Thickness for Maximum Load Capacity 1/2 in Activation Mechanism On/Off Handle Magnet Length 3 1/4 in Magnet Width 2 1/2 in Magnet Height 2 5/8 in Overall Length 4 3/4 in Overall Width 5 7/8 in Overall Height 5 in Bail Inside Width 1 3/8 in Bail Inside Length 2 3/8 in Handle Length 5 3/8 in Minimum Operating Temperature 40 Degrees F