Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm)

ProprietaryFlip SocketIn 3 kits

Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm) comes in 3 Klein Tools KNECT kits. The cheapest kit that includes it is the 6513MQS at $37.48 (Ace Tool, 2026-10-18).

Sizes: 15 mm · 16 mm · 18 mm · 19 mm
Connects to: 3/8" Square Drive
Type: Proprietary (system-specific)
Category: Flip Socket

Cheapest kit that includes it

$37.48

6513MQS · Quad-4 Heavy-Duty Impact Flip Socket, Metric, 2-Piece · Ace Tool, 2026-10-18See the 6513MQS →

Kits that include the Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm)

Kit	Qty	Kit price from
Quad-4 Heavy-Duty Impact Flip Socket, Metric, 2-Piece 6513MQS	1	$37.48
Quad-12 Heavy-Duty Impact Flip Sockets, Metric, 6-Piece 653MQS	1	$69.98
Quad-24 Heavy-Duty Impact Flip Sockets, SAE and Metric, 9-Piece 656QS	1	$99.98

Notes

Four sizes in one spring-loaded socket. 3/8-inch square drive (Klein lists drive sizes 1/4" and 3/8" for the Quad-12/24 sets). Also sold outside KNECT (651QS, 651MQS, 6512QS, 652QS, 652MQS).

Other sizes and variants

Quad-4 Heavy-Duty Impact Flip Socket, SAE Large (3/4, 13/16, 7/8, 1)
In 3 kits

Questions

Which kits include the Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm)?

6513MQS (1×), 653MQS (1×), 656QS (1×).

What is the cheapest way to get the Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm)?

Buy the 6513MQS, Quad-4 Heavy-Duty Impact Flip Socket, Metric, 2-Piece, from $37.48. We have not found it sold on its own.

What does the Quad-4 Heavy-Duty Impact Flip Socket, Metric Large (15, 16, 18, 19 mm) connect to?

3/8" Square Drive.