I received these two air chuck mini locks just in time. The only complaint I have is that they are not 1/4" as many reviewers have stated, but are much smaller.As I was in a hurry I didn't take a single photo but I saw other reviewers show a clear difference in the photos they provided.I installed one on my old bike floor pump and it was pretty good .Until I tried installing a second one on my gauge tire inflator!Significant gap between the inner tube and the OD of the rod.I used a mixture of pipe thread sealant and teflon tape to fill the gap and get it working.I know Don't know why this product is labeled as 1/4" notch and why there were no fixes. Still I agree with this one Product in general because I didn't expect anything else given the price. If you are looking for something high quality and precise, choose the Jaco Lightning L2 Series Open Flow Pneumatic Tire Clamp of 2 for $24.95.