CRAFTSMAN CMMT12068 20-Piece Metric Combination Wrench Set

The CMMT12068 covers metric 4–24 mm in 20 wrenches: six miniature combos (4–10 mm) and fourteen standard combos (10–24 mm). All four critical engine-bay and undercarriage sizes — 10, 13, 17, and 19 mm — are present and confirmed from the manufacturer specification. The steel is Chrome Molybdenum (Cr-Mo), one step above the Chrome Vanadium baseline in most consumer combo sets. Box ends are 12-point with a 15° offset for knuckle clearance. No jaw-spread or fastener-rounding complaints appear in the 270-review sample (4.6★); one December 2025 owner describes the open ends as "beefy yet thin enough for tight spots." The miniature wrenches (4–8 mm) draw a note from one reviewer that they are too small to grip comfortably for hand use — a real ergonomic observation for the sub-10 mm range. Storage is ambiguous: one verified reviewer says no pouch is included; another describes a thick roll-up pouch. The set is SAE-excluded by design; CMMT12067 is the companion SAE set.

The right pick for a home mechanic who services predominantly metric vehicles — import brands (Toyota, Honda, BMW, VW) and most modern domestic models — and needs comprehensive coverage from tiny M4 fasteners through M24 suspension hardware in one set. The Cr-Mo alloy and CRAFTSMAN Lifetime Warranty (honored at Lowe's and Ace Hardware) represent solid long-term value for a DIY garage. Skip it if your vehicle fleet is mixed domestic/import and you need SAE coverage — without SAE wrenches, this set handles half the fasteners. Also skip it for corroded undercarriage fasteners where you'd benefit from 6-point geometry; the standard 12-point box ends apply torque at the corners rather than the flat faces, which increases rounding risk on already-compromised hex heads.

No chemical exposure pathway — the CMMT12068 is a Chrome Molybdenum steel hand tool with no SDS. The Prop 65 flag does not appear on this ASIN per the Rainforest API product data. The steel body is recyclable through standard ferrous scrap streams; the storage solution (if any) is likely nylon and is not recyclable. Cr-Mo combination wrenches are designed for decades of service — the environmental footprint is dominated by the one-time steel production, which is fully recyclable at end of life. Eye and hand protection during mechanical work reflects the task environment, not any chemistry in the tool.