National Hardware Smooth Rods Cold Rolled 5/16" x 48" Brand_Chapin with a connecting rod-actuated piston

with a connecting rod-actuated piston pump

the cross bore should be 2-1/8 inches in diameter

clearance between door and door jamb

and knuckle strap

And when the dusting head is dirty no need to try and shake it out or hand wash detach the microfiber head and machine wash then air dry

National Hardware Smooth Rods Cold Rolled 5/16" x 48" Brand_Chapin with a connecting rod-actuated pistonNational Hardware's Smooth Rod is designed for fencing, supports, railing, sign posts, frame work and other industrial applications. Made from cold rolled steel for higher yield strength, hardness, and tighter specification. Excellent forming and welding characteristics For exterior applications Meets ASTM A510