OK, I've only used the brushes once, but the fit seems like a perfect match for the original head of my Sonicare HX751V. On the original brush head there is a metal ring with a chip that identifies the brush. The aftermarket head has a blank ring, so I guess automated settings are not enabled, but that does not concern me. The metal rings can be popped out and switched if need be. The intensity can be manually adjusted while the toothbrush is running by hitting the intensity button.
Tormek #TOR-SVM45 Knife Jig
Oct 27, 2020
Good grip
It's amazing how securely this jig clamps a knife. The tensioning thumbscrew causes the jaws to close like a pair of scissors. The jaws are molded so that only the corners make contact. Amazing grip, really. I don't care for how easily the plastic handle/stop rotates. If you try to manipulate the knife with it, it turns so easily and changes the angle, since it screws up and down the shaft.
Replace that with a piece of wood. End grain hardwood with an undersized hole and a relief cut down one side. It clamps very small blades poorly. Unfortunately, most of my blades are tiny carving tools, but I manage, just barely to avoid grinding the jig. This seriously needs some tempered steel inserts so that the jaws can be thinner than the weak zinc alloy allows, and thus approach the stone nearer, and at a lower angle. This is where my crummy homemade jig with thin steel jaws maintains its relevance.
Batteries last 1-2 months, compared to 1-2 years with another brand. My proof is the car saying key battery is low. Batteries advertised as fresh, exp 2027, yet something is odd with them. Good value maybe, considering the price, but I did not expect them to be nearly this bad.