Lifting Magnet Maximum Flat Load Capacity 334 lb Maximum Round Load Capacity 167 lb Minimum Thickness for Activation 1/4 in Minimum Thickness for Maximum Load Capacity 3 in Activation Mechanism On/Off Handle Magnet Length 4 1/4 in Magnet Width 4 in Magnet Height 3 in Overall Length 5 3/4 in Overall Width 13 1/4 in Overall Height 9 3/4 in Bail Inside Width 4 in Bail Inside Length 2 1/4 in Handle Length 2 1/2 in Minimum Operating Temperature -10 Degrees F