Malco Tools HW7X1/2ZT Zip-in® Self Piercing Sheet Metal Screws, #7 x 1/2, 1000 Count LD5000 For 1/8” to 5/8” (4

For 1/8” to 5/8” (4 mm to 15 mm) O

Jaw Capacity:  1

heat-treated steel bits for long-lasting use

Powerful enough to go through most walk-in coolers and freezers

Malco Tools HW7X1/2ZT Zip-in® Self Piercing Sheet Metal Screws, #7 x 1/2, 1000 Count LD5000 For 1/8” to 5/8” (4Malco Tools HW7X1 2ZT Zip in Self Piercing Sheet Metal Screws, #7 x 1 2, 1000 Count Malcos 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. A unique thread design and quality controlled manufacture spell the Zip in sheet metal screw difference. Zip ins are made with a sophisticated heat treat process which allows the screw to taper to a fine, sharp point without