Bullet_point: ['For the best performance, use any Zip-in Sheet Metal Screw with a Malco C-RHEX Cleanable, Reversible Dual Sided Hex Driver.', 'Malco’s Zip-in Screws are known for their superior quality and is considered by many for being the best screw choice for HVAC metal duct fastening.', 'Malco’s Zip-in screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.']

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