SakerContour Gauge (10 Inch Lock) Profile Tool-Adjustable Lock-Men Gifts for Men Dad Him Boyfriend Husband-Precisely Copy Irregular Shape Duplicator-Irregular Welding Woodworking TracingCarbonfree Certified

Works great - I chose this one after borrowing a friend’s who had a different brand (don’t remember the name sorry) and while it contoured around whatever you wanted easily - it crucially didn’t have a lock mechanism (to keep the shape of what you are drawing out for cutting)I found while not unusable - the other contour gauge (without this lock mechanism) would often get slightly bumped out of place if I wasn’t able to cut the material in situ (right there and then) which as I do most of my cutting at a bench outside wasn’t ideal.This one comes with the tiny hex bar for adjusting the resistance of the contour ‘strips’ (for lack of a better word) though would have been nice to have this housed somewhere on the gauge (comes taped to the underside when you receive the item in its box).But the lock mechanism is the start of the show - which is integral to the gauge and is not another thing to loseIf you haven’t invested in a hex multitool of differing sizes - it’s probably time to - I have and it’s worth its weight in gold from assembling flat pack furniture to keeping my bike fittings tight and squared away to DIY projects etc. it’s why the loose hex key/bar that comes with this isn’t really a significant minus in my books - but if you haven’t got a multitool of various sized hex bars handy - you’ll need to keep the little one provided extra safe.I can see some projects - particularly if you’re contour gauging something that bends easily - like a thin plastic container for example - needing the contour strips quite loose so they do their job without pushing too hard or morphing the object you want it to measure around.Overall - really happy and worth looking at the seller options for a keen price as it does seem the Saker Contour Guage can vary in price by quite a bit. Hope this info helps 👍