Acorn SW-MW2BK250 Screw, #9 Thread, High-Low, Twin Lead Thread, Hex Drive, Self-Tapping, Black, 250/BAG Sump Pumps - Submersible The patented head to handle

The patented head to handle connection has a reinforced steel pin for improved safety and is a great choice for outdoor professionals

Internal fuse to protect all devices

Holder with teeth fits tops of emitters and fittings for insertion into supply tubing

Holds up to six replacement blades in handle

Acorn SW-MW2BK250 Screw, #9 Thread, High-Low, Twin Lead Thread, Hex Drive, Self-Tapping, Black, 250/BAG Sump Pumps - Submersible The patented head to handle#9 15 Metal to wood screws are sealing self piercing tapping screws made from heat treated Steel, case hardened for roofing and siding applications. A 1 4 in across flats high hat hex washer head with assembled EPDM washer offers easy driving and conforms to the metal surface for a secure and long lasting seal. The twin lead type 17 point and hi lo threads offer faster drive time and greater resistance to pullout. All screws are 1000 hr salt spray