A white background studio shot displaying the entire contents of the 121-piece Crescent mechanics tool set laid out, including ratchets, sockets, extensions, hex keys, bit driver, and various bits.
An overhead view of the open gray and red blow mold case for the Crescent 121-piece tool set, showing all tools neatly organized within their custom-fit compartments against a white background.
A white background studio shot showcasing a large organized collection of chrome sockets from the 121-piece set, arranged in rows by size and depth, highlighting both standard and deep well options.
A white background studio shot focusing on the chrome ratchets and extensions from the tool set, including a 1/4" drive ratchet, a 3/8" drive ratchet, and two chrome extensions, highlighting their polished finish.
A white background studio shot displaying smaller accessories from the tool set, including two sets of red hex keys, a black bit set, and a red and black bit driver with a chrome shaft.
The closed packaging of the Crescent 121-piece Professional Tool Set, displaying the tool case with a red handle, the Crescent logo, "121 pc," and key features like "Lifetime Warranty," "Alloy Steel," and socket size distribution.
The 121-piece Crescent mechanics tool set opened on a wooden workbench, showcasing the organized sockets, ratchets, and other tools within its gray case, with engine parts and a red cloth nearby
A close-up of a person wearing black gloves using a chrome ratchet and socket to tighten a bolt on a car engine, showing intricate engine components.
A white background studio shot displaying the entire contents of the 121-piece Crescent mechanics tool set laid out, including ratchets, sockets, extensions, hex keys, bit driver, and various bits.
An overhead view of the open gray and red blow mold case for the Crescent 121-piece tool set, showing all tools neatly organized within their custom-fit compartments against a white background.
A white background studio shot showcasing a large organized collection of chrome sockets from the 121-piece set, arranged in rows by size and depth, highlighting both standard and deep well options.
A white background studio shot focusing on the chrome ratchets and extensions from the tool set, including a 1/4" drive ratchet, a 3/8" drive ratchet, and two chrome extensions, highlighting their polished finish.
A white background studio shot displaying smaller accessories from the tool set, including two sets of red hex keys, a black bit set, and a red and black bit driver with a chrome shaft.
The closed packaging of the Crescent 121-piece Professional Tool Set, displaying the tool case with a red handle, the Crescent logo, "121 pc," and key features like "Lifetime Warranty," "Alloy Steel," and socket size distribution.
The 121-piece Crescent mechanics tool set opened on a wooden workbench, showcasing the organized sockets, ratchets, and other tools within its gray case, with engine parts and a red cloth nearby
A close-up of a person wearing black gloves using a chrome ratchet and socket to tighten a bolt on a car engine, showing intricate engine components.
Crescent

Crescent Socket Wrench Set CTK121C 121 Piece (1/4 3/8 Inch Drive SAE Metric 72 Tooth Ratchet Off Corner Loading Chrome Blow Mold Case Mechanics)

In stock
SKU: CTK121C
$106.75 USD

Description

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Crescent CTK121C 121-Piece 1/4-Inch and 3/8-Inch Drive Socket Wrench Set

The Crescent CTK121C 121-Piece Socket Wrench Set is an industrial hand tool kit engineered for engine bay maintenance, machinery repair, and automotive chassis service. Featuring 1/4-inch and 3/8-inch drive 72-tooth teardrop quick-release ratchets with a tight 5-degree swing arc, this comprehensive set includes a full assortment of 6-point and 12-point standard and deep sockets covering SAE sizes from 5/32 in. to 3/4 in. and metric sizes from 4 mm to 19 mm. Manufactured from chrome alloy steel with off-corner loading technology to prevent fastener rounding, this 12-1/20 pound collection includes drive extensions, a dual-material bit driver, and a heavy-duty blow-molded case that meets ANSI and ASME standards.

Best Used For:

  • Automotive Engine & Chassis Repair: Accessing tight engine compartments and suspension bolts using 72-tooth ratchets with a 5-degree swing arc.
  • Industrial Machinery Maintenance: Servicing hydraulic lines, motor mounts, and mechanical assemblies with off-corner loading sockets.
  • Commercial Equipment Assembly: Fastening SAE and metric nuts, bolts, and threaded rods across shop and field environments.

Key Performance & Safety Features

  • Off-Corner Loading Technology: Socket wall geometry grips the flat sides of hex fasteners rather than the corners to prevent stripping.
  • 72-Tooth Quick-Release Ratchet Mechanisms: Teardrop head ratchets deliver a 5-degree swing arc for maximum leverage inside confined spaces.
  • Full Polish Chrome Finish: Mirror-polished chrome plating resists corrosion, chemical staining, and wipes clean easily after greasy jobs.
  • Comprehensive SAE & Metric Size Range: Sockets span from 5/32 in. (4 mm) up to 3/4 in. (19 mm) in both standard and deep length profiles.
  • Molded Organizer Blow-Mold Case: Heavy-duty blow-molded carrying case locks every socket and drive tool securely into labeled slots.
  • ANSI & ASME Quality Compliance: All hand tools meet or exceed current ANSI and ASME strength and dimensional tolerances.

What's Included

  • (1) 1/4 In. Drive 72-Tooth Quick-Release Teardrop Ratchet (CR14)
  • (1) 3/8 In. Drive 72-Tooth Quick-Release Teardrop Ratchet
  • (1) 1/4 In. Drive Dual-Material Bit Holding Screwdriver Handle (CRW25C)
  • (5) 1/4 In. Drive 6-Point Metric Deep Sockets (6mm, 8mm, 9mm, 10mm, 12mm)
  • (5) 3/8 In. Drive 6-Point SAE Deep Sockets (7/16 in., 9/16 in., 5/8 in., 11/16 in., 3/4 in.)
  • (7) 1/4 In. Drive 6-Point Metric Standard Sockets (6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 13mm)
  • (8) 3/8 In. Drive 12-Point SAE Standard Sockets (1/4 in., 5/16 in., 3/8 in., 7/16 in., 1/2 in., 9/16 in., 5/8 in., 3/4 in.)
  • (11) 3/8 In. Drive 12-Point Metric Standard Sockets (7mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm)
  • (28) Assorted SAE and Metric Deep and Standard 6-Point / 12-Point Sockets
  • (53) Screwdriver Bits, Hex Keys, Extensions, and Drive Adapters
  • (1) Heavy-Duty Blow-Molded Storage Case

Technical Specifications

Brand / Manufacturer Crescent
Model / Part Number CTK121C
Total Component Piece Count 121 Pieces
Drive Tang Sizes Included 1/4 in. and 3/8 in. Drive
Measurement Sizing Formats SAE (Fractional) and Metric
Ratchet Mechanism Tooth Count 72 Teeth (5-Degree Swing Arc)
Socket Length Formats Included Standard and Deep Well Sockets
Min / Max Socket Size Range 5/32 in. to 3/4 in. (4 mm to 19 mm)
Material Construction & Finish Drop-Forged Chrome Alloy Steel with Full Polish Chrome
Storage System Case Type Heavy-Duty Blow-Molded Organizer Case
Total Weight (Catalog) 12-1/20 lbs (12.050 lbs / 5.46 kg)
Pro-Tip: Press the quick-release button on the back of the ratchet head before seating or removing sockets; utilizing the quick-release mechanism prevents socket retention detent ball wear and keeps sockets from dropping into engine bays.