The Stanley sk58 Sinker Drill is a heavy duty rock drill designed for drilling underwater in concrete, rock and masonry. The feathering on/off valve makes starting the drill bit relatively easy. The sk58 uses industry standard drill steel and can drill up to a 3″ (75 mm) diameter hole up to 20′ (6 m) deep. The direct drive rotation motor drives the 1″ x 4¼” hex shank drill steel and is adjustable between 0 and 300 rpm. Air is required to clear holes of debris. Painted hi-visibility yellow.


  • T-Handle with feathering on/off valve allows easy start and control
  • Rotation speed adjustable between 0 and 300 rpm
  • Stainless Steel spools and fasteners
  • Four tie rod design for durability
  • Uses standard rock drill steels: 1″ x 4¼” Hex Shank
  • Drills up to 3 in diameter hole up to 20′ deep
  • Operates in any position
  • Requires air to clear holes of debris
  • Trouble free drill steel latch retainer

Ordering information
When hydraulic hose exceeds 100′ (30.4 m) in length, increase I.D. of both pressure and return hose. For more information, consult Stanley Hydraulic Tools.