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3/8 Inch Drive 12-Point Socket and Ratchet Set, 74-Piece (1/4-1 in., 6-24 mm)

Item #SKT15312
 • Ships tomorrow
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Also available in 6-point

Set Includes:

Add socket rails and tray storage:

3/8 Inch Drive Socket Rail and Tray Set

#OST91901 | $42


Socket Markings

Large, Stamped Markings

  • Permanently impressed into the material by a roll-stamp die
  • As large as possible while still being readable along the socket’s curved surface
  • Clearly visible size numbers with extra-deep outline
Socket Markings
Deep-length socket in tight, recessed area

Fully Stepped Shoulders

Narrowed diameter stretches to the base of the socket on small, deep-length sizes. This provides greater reach into tight, recessed areas.

Tekton deep-length socket with fully stepped shoulers
Socket cut in half

Exterior + Interior Finishes

  • Chrome-plated exterior is highly corrosion resistant and wipes clean to a mirror finish
  • Interior is protected against rust with clear coat, rather than commonly-used metallic paint
Socket cut in half
12-Point Socket Opening

12-Point Socket Opening

Get more access positions for multiple types of fasteners

12-Point Socket Fastener Types

Prevents Fastener Round-Off

12-Point Socket Grips Sides

Radiused corners prevent fastener round-off by applying force to a fastener’s flat sides, rather than its corners.

Drive tool engaging socket

Secure Drive Tool Engagement

  • Four detent grooves provide a secure connection with the retaining ball of a drive tool
  • Beveled inner rims help guide the socket onto other tools

High Torque Strength

Meets minimum value of 1.2 times the ANSI standard for Proof Torque. Verified by a single-cycle test that applies torque until specified value is reached without failure or permanent deformation.


3/8 inch drive deep-length sockets torque specs chart (metric series)
Source: ASME B107.5M - 2002


3/8 inch drive deep-length sockets torque specs chart (inch series)
Source: ASME B107.1 - 2002
90-Tooth Quick Release Ratchet

90-Tooth Ratchet

  • 4-degree swing arc
  • Ultra-compact head is reduced in all dimensions
  • Quick-release drive locks sockets onto tang and releases with the press of a button

View Ratchet

90-Tooth Quick Release Ratchet
18 Inch Breaker Bar

Breaker Bar

  • 230-degree pivoting head without preset positions
  • 18 inch long handle for increased leverage

View Breaker Bar

Included Accessories

3 and 6 Inch Extensions

3 and 6 Inch Extensions

Reach past obstructions and into tight spaces. Knurled band provides grip for starting or turning loosened fasteners.

Universal Joint

Universal Joint

Pin-style joints rotate smoothly and continuously to access fasteners at up to 55-degree angles.

Carrying Case

Carrying Case

  • High-density polyethylene material withstands common lubricants, fuels, and solvents
  • Carrying handle, strong latches, and metal hinge pins
  • Molded size markings for each tool and a deep parts tray