Lifting Magnet Maximum Flat Load Capacity 150 lb Maximum Round Load Capacity 75 lb Minimum Thickness for Activation 1/4 in Minimum Thickness for Maximum Load Capacity 3 in Activation Mechanism On/Off Handle Magnet Length 3 in Magnet Width 2 1/2 in Magnet Height 2 3/4 in Overall Length 4 1/4 in Overall Width 6 1/8 in Overall Height 9 in Bail Inside Width 3 in Bail Inside Length 2 1/4 in Handle Length 2 1/2 in Minimum Operating Temperature -10 Degrees F