Latest design with black oxide rust preventive treatment, cheap copies online are not black! Includes an 8-pack of 389-100 replacement sparkplug inserts for the Calvan 38900 kit. *Note kit required to install. Made by Horizon Tools, the M14x1.25 Taper seat insert has arguably repaired more spark plug blowouts than any other brand. Also works for the Blue Point FRT10 model sold by Snap On and SP389FC sold by Mac Tools, because Horizon Tools makes those brands too. During the week, we ship the same day if the order is placed before 3PM. Normal ship time is 2-3 days. Need it quicker? Call 800-734-8665.

• Over-size insert (Only one size is made for this kit). It measures .73" on the outside diameter O.D.
• Steel Alloy is ten times stronger than aluminum.
• Buy in bulk and save - see the bulk pricing options on the single insert listing.
• See our YouTube video for more information on Cal Van inserts.
• Snap On FRT10-INS About 1/2 of the cost compared to Snap On Tool Trucks!

Is your Snap On, Mac or Matco guy out of inserts? Or just looking for a better price? Congratulations it's your lucky day. The 389-100 is the same as the Snap On/Blue Point FRT10-INS replacement insert. Snap On sells them for over $35 or more each. This is also the same spark plug insert for Mac Tools part number SP389FC thread repair kits. Same as Matco FTS389 inserts as well (same manufacturer). Same as CAL389-100, 389-100 ET389-100, ET 389-100, CV389-100, CV 389-100. Also sold as CTA Tools 2367, Mountain 9200, ATD 5400.