Laser Magnetic Spark Plug Socket 3/8"D 21mm 3683
14-day returns on all eligible orders
Contact us within 14 days of receiving your order to request a return.
Shipping information
Orders are picked, packed and dispatched from our Northampton warehouse.
- Free delivery to mainland UK addresses on orders of £40 or more.
- Orders under £40, and orders to Northern Ireland, have a delivery charge, shown at checkout before you pay.
- You will get an email with your tracking number once your order has shipped.
Full details are in our Shipping Policy.
Returns & warranty
Changed your mind? You can return an online order within 14 days of receiving it. Please contact us first for return instructions, then you have 14 days to send the goods back.
- Items must be unused, complete and in their original condition, with all accessories, instructions and original packaging.
- You arrange and pay for the return postage on change-of-mind returns. We refund the price of the item plus our standard delivery charge.
- Damaged in transit? Let us know within 48 hours of delivery - photos help.
- Faulty or wrong item? Contact us before sending anything back. Faulty goods are covered by your statutory rights.
Your statutory rights are not affected. Full details are in our Refund Policy, or email onlinesales@nn4online.co.uk.
An extra long, thin walled 21mm spark plug socket with magnetic end for reliable spark plug removal and installation. The 250mm tool length is designed to reach deep plugs without the need for an extension bar and the slim diameter is ideal for accessing modern engines with limited plug clearance. This professional quality tool has a standard 3/8" square drive and a knurled end for finger grip tightening.
Thin wall spark plug socket for use on modern engines with limited plug clearance. Extra long to access deep seated spark plugs.
Size: 21mm Bi-Hex (12pt) x 3/8"D x 250mm long.
Outside diameter: 27mm; inside depth: 71.8mm
Magnetic end holds the spark plug safely & securely, with the knurled end for finger grip tightening.
Manufactured from chrome vanadium. Other sizes available, please see Laser Part Nos. 3681 (14mm)& 3682 (16mm).