Klein Tools Metric Impact Flip Socket Set 6513MQS 2 Piece Quad 4 (3/8 Inch Drive 4 in 1 Metric Spring Loaded Steel Hex Fastening Adapter)

Klein Tools 6513MQS KNECT™ Quad-4 Metric 4-in-1 Coaxial Heavy-Duty Impact Flip Socket Set

The Klein Tools 6513MQS KNECT™ Quad-4 Metric Impact Flip Socket Set provides a multi-size power fastening extension engineered to consolidate four metric hex drive dimensions into a single dual-ended socket body paired with a 3/8-inch drive KNECT™ (M) system adapter. Forged from heat-treated cold-forged alloy steel with a black manganese phosphate surface finish, this 7.8 oz (0.49 lb) impact-rated assembly measures 4.24 inches high by 1 inch wide and incorporates spring-loaded coaxial socket sleeves across 15 mm, 16 mm, 18 mm, and 19 mm sizes. Built to withstand high-torque rotational shock loads from power drivers and pass-through wrenches, this modular system allows commercial electricians, machinery mechanics, and automotive technicians to press socket walls directly over metric bolt heads for immediate hands-free size switching without removing the tool from recessed clearance bays.

Best Used For:

• Recessed Metric Machinery Bolting: Servicing industrial equipment and motor mounts featuring 15 mm, 16 mm, 18 mm, and 19 mm metric hex hardware without swapping individual socket units.
• Deep-Reach Threaded Rod Fastening: Reaching buried nuts and long threaded shafts in tight enclosure bays utilizing a deep-well coaxial socket housing.
• Modular KNECT System & Impact Integration: Connecting directly to KNECT™ (M) pass-through ratchets or 3/8-inch square drive impact wrenches for continuous high-torque driving.

Key Performance & Safety Features

• 4-in-1 Quad-4 Coaxial Metric Socket: Combines 15 mm, 16 mm, 18 mm, and 19 mm metric hex sizes into one dual-ended reversible socket body.
• Hands-Free Spring-Loaded Action: Inner spring-loaded socket sleeve retracts automatically under forward pressure to access larger hex sizes without manual adjustment.
• Heat-Treated Cold-Forged Steel Body: Premium metallurgy construction withstands extreme rotational impact torque loads without fracturing or galling drive walls.
• Corrosion-Resistant Black Manganese Phosphate Finish: Industrial surface coating shields steel components against oxidation, oil, and harsh jobsite fluids.
• Multi-Purpose KNECT (M) Adapter: Included 3/8-inch drive adapter locks into KNECT™ pass-through ratcheting handles and standard impact wrench anvils.
• Industry-Standard Color-Coded Bands: High-contrast color identification rings allow rapid visual verification of metric socket dimensions in low-light environments.

What's Included

• (1) Klein Tools Quad-4 Coaxial Reversible 4-in-1 Heavy-Duty Metric Impact Flip Socket (15mm, 16mm, 18mm, 19mm)
• (1) KNECT™ (M) System Multi-Purpose Drive Adapter

Technical Specifications

Pro-Tip: To drive 15 mm or 18 mm hardware, push the tool firmly onto the bolt head so the internal spring compresses fully. For larger 16 mm or 19 mm hardware, pull the socket body outward or flip the sleeve around to engage the outer socket profile directly without depressing internal springs.