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Zinc and rubber drain wrench, 13 in long, hexagonal body with square end

Superior Tool

Superior Tool 03710 Drain Wrench Zinc Rubber

SKU CH-WMJN-TJ3F5

A zinc and rubber drain wrench fits hex nuts and 4-, 6- and 8-tab locking nuts on strainer drains, sink baskets and drop-in shower drains

  • Main materialHAWA
  • Product weight0.6
  • Removes strainer nuts without damage using self-adjusting jaws
  • Tightens stand-up shower drains with dedicated square drive end
  • Fits 4-, 6- and 8-tab locking nuts on sink drains
  • Lightweight zinc and rubber construction weighs .6 kg
  • 13 in overall length provides reach in deep basins

What this tool does

The Superior Tool 03710 is a drain wrench made from zinc and rubber for plumbing tasks. It fits hex nuts and all 4-, 6- and 8-tab locking nuts on strainer drains. The square end is specifically designed for tightening stand-up shower drains. It works with locking nuts on strainer drains, drop-in shower drains, sink baskets and sink drains.

The fit that matters

This wrench is built for an inside diameter of 4 1/4 in and uses a SAE hex pattern. It is not adjustable but operates with a self-adjusting action on compatible nuts. The overall length is 13 in and the overall diameter is 5 3/8 in. Matching these dimensions to the drain hardware decides whether the tool will engage correctly.

Behaviour under repeated use

The zinc body and rubber elements resist deformation when torque is applied repeatedly across multiple fixtures. The self-adjusting mechanism maintains grip on 4-, 6- and 8-tab nuts without slipping during sustained tightening or removal cycles. Weight is 0.6 lb, giving enough mass for leverage while remaining manageable for extended periods.

How it compares

Measured against everything we stock in Drain Cleaners & Plumbing Tools, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 80% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameSUPERIOR TOOL
Size & build
Main materialHAWA

Questions about this item

What does the 13 in overall length mean when I am working under a sink?

The 13 in length gives enough reach to engage drain nuts through the basin opening while keeping your hand clear of the faucet base and supply lines.

How does the SAE hex sizing affect which nuts this wrench can turn?

The SAE 4 1/4 in hex matches standard strainer-drain lock nuts and all 4-, 6- and 8-tab locking nuts, so it fits the common sizes without needing an adjustable jaw.

What clearance does the 5 3/8 in overall diameter need to fit through a sink opening?

The 5 3/8 in diameter requires a drain opening at least that wide; it drops straight into standard 4 1/4 in inside-diameter sink baskets and shower drains.

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