TEKTON 1/2 Inch Drive x 21 mm Deep 6-Point Socket | SHD23121 21 mm, 6-point
Part Number: SHD23121. Item model number: SHD23121. Manufacturer: TEKTON. Tekton 6-point sockets are ideal for working with hex-shaped fasteners. They’re designed to grip the sides and not the corners of the fastener heads, which prevents round-off.