Alpha Magnetic Bit Holder With C Ring 1/4in x 75mm Thunderzone Carded CMBHC75SSMagnetic Bit Holder With C Ring 1 4in x 75mm Thunderzone Carded Maximum strength for high impact & extreme torque loads Perfect for metal to metal fastening when extreme tightening down is required The torsion zone provides maximum strength for high impact & extreme torque loads Superior magnetism helps the bit grip the screw and prevent cam out Weight (gr) 40. 00