The Mr. Hard Water Knuckler™ Hand Scrubbing Tool is a re-useable, durable, tough scrubbing block that saves your knuckles when scrubbing!  It’s great for cleaning edges, flat, or curved surfaces.  Mr. Hard Water™ Gold or Silver Knuckler™ Cleaning Pads™ fit snugly on the Knuckler™ and are easily changed out.


  • Fits the Mr. Hard Water™ Knuckler™ Cleaning Pads!
  • Made of tough, durable plastic
  • Reusable
  • Indoor and Outdoor
  • Optimized for hard water removal
  • Uses: Windshields, windows, mirrors, shower doors, glass table tops, pool & tile, porcelain, ceramic stove tops, glass table tops and more


This is a new product.  Unfortunately, the black and red one has been discontinued.  The steel wool cleaning pads fit both scrub blocks so they are interchangeable.

Additional information

Weight 1 lbs
Dimensions 5 × 5 × 5 in
Primary Use