Save time with the Large Open-tip Curved Magnums. Also known as Shovel Mags. Needles are 12 Gauged. Available in 29 , 35 , 39 , 45 , and 49 Curved Magnums. Please note that not all machines will have the power to push all these needles into the skin. A strong hitting motor on your machine is needed for these cartridges to be effective.