This is a review form a chemist's perspective.Why 4 out of 5? See below.Subjective comments: I would have expected the curvature of the clamp's claws to be less obtuse (I had to check out this term myself) to add more grasp to B14 and B19 flasks. Securing B19 is doable, but B14, securely at high temp and with very thin glass thickness could lead to a problem, when the flask falls off (just to say)!Subjective comment nr.2: I do appreciate the possiblility to a certain extent to extend the reach of the clamp while connected to "stainless steel support rod for hot plate stirrers", it can provide you with some level of flexibility while placing multiple flasks to heat on the same oil-bath.Additional comments: When attaching to the "stainless steel support rod for hot plate stirrers" I can only to suggest to check the total extent of the clamp, because depending of the diameter of your heating plate the reach of the clamp may or may not be sufficient to place your flask in the center of the oil-bath.So far (

The integrated boss saves having to buy one. The clamp swivels through 90 degrees so can be used for vertical or horizontal holding. The quality matches the items I used when I taught school chemistry.

Ich nutze den Halter als Befestigung für einen Absaugschlauch. Dafür ist die Klemme gut geeignet, da so flexibel einstellbar und robust genug.

Used this combined with a Gigpad Guitar Rest to rig a guitar stand in a tight space next to my desk. Works very well for this. I'd definitely recommend!

Ottimo prodotto spedizione rapida.

This product is exactly what I wanted. It's sturdy and was delivered very fast via Amazon. It is a Quality product that will last me for years. Thankyou. I will be buying more.