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Your cart is empty.The Original TopStar Fastening System replaces shimming and can make door hanging a one-person job. TopStar is a dual screw which works as one and is perfect for door jams/wooden windows, insulation, paneling and cabinets. Great for any fine adjustments in both directions. Coated with hexavalent chromium (CR6+) free and complies with the strictest standards governing chemical substances.
Kathleen B
Reviewed in the United States on May 7, 2025
Much easier than using shims
timex fan
Reviewed in the United States on May 18, 2025
These truly are an amazing product when it comes to installing doors, it gives you adjustment. That’s so easy.It is worth it to look at an instruction videos
Erick S
Reviewed in the United States on February 22, 2025
Extremely easy to install! Recommend installing behind door stops to hide the screws from being visible. No need for shims or other fasteners. I’m very pleased with my purchase.
David M.
Reviewed in the United States on February 17, 2025
I had no idea about these until somebody told me, so now I'm telling you. But these if you're undertaking a door install. These make leveling and squaring up your door soooo easy. Yes you need the special bit that is used with it, so if it's not included, buy it.
Cami Shackelford
Reviewed in the United States on April 17, 2025
Does not work
Dennis L.
Reviewed in the United States on April 12, 2025
$50 and it doesn't come with the bit you need to drive them.
Thomas Blakely
Reviewed in the United States on December 7, 2024
This is the only fastener I use on exterior doors now, buy the GRK bit though I’ve broken two of the U2 ones I only use my drill to install never the impact
Frans
Reviewed in Canada on December 31, 2024
I use these to readjust window door frames when they are crowned in to far, with these I can straighten the frames again without taking trim or caulking off.Only a little pricey but work fine.You will need to purchase the driver separately for them to use.
KrakenTown
Reviewed in the United States on September 1, 2023
These adjustable fasteners are fantastic for installing door jams. The micro adjustments you can make when they are in place really work well for getting the jams squared up easily. While they are advertised as removing the need for shims, I recommend still using shims for the "rough" alignment of the jams first then using these fasteners to both hold the door in place and making final adjustments. The only thing that I was not completely happy with and that was not initially obvious to me is that you have to drill in a fairly sizable (~1/2 inch wide) countersink hole so that the top of the star drive head sits flush with the inside face of the jam. This can still be hidden behind the weather stripping, but needs to be done carefully so it's deep enough, but you don't accidentally drill do deep with such a big bit.
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