Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: What's the diameter of the locking pin/disc, are these easy to set on the thighs before tossing them up for incline/military presses?
Document: These Ironmasters tighten up very snug when you screw the locking pin in. No rattle whatsoever. They feel as tight as the fixed dumbbells at the gym.The only thing the Selectech has over the Ironmaster is that you can change the amount of the weight faster (although it's still pretty easy with the Ironmasters). The Ironmaster is so much better constructed, however, that it's still the easy choice. Very high quality construction. Plus, they throw in the storage shelf along with the dumbbells. I couldn't be happier with this purchase.
I expected that these would be well designed; that they would fit together tightly; that I could rest them on my thighs when I had loaded them up to do bench presses and would have to kick them back into position... all the things I had read in the Amazon reviews. Moreover, having read glowing things in the weight training forums about Ironmaster customer service, I expected that if I had any problems they'd get taken care of. And I am in no way disappointed.Everything I read about the product and the company is right on, and I love using the dumbbells.
I did a lot of research for an adjustable set of dumbbells. What made me decide upon the Iron Master set is the quality (having no plastic), the gym feel of the handles, the flexibility with the choice of weight (able to do 2.5lb changes), and the locking system (the sense of security that the weights were not going to fall off during workouts). I wasn't sure on how easy it would be to change the weights, but it really is as easy as described. I didn't know it at the time, but Iron Master will also sell the handles and locks separately.
When doing chest and military dumbbell presses I was always concerned they would fall on my head. They never did but it often affected my concentration during the lifts. The rattling of the weights doesn't ease one's concern. Finally, they did start to fall from the holder when lifting from the stand- tabs broken. Subsequently, the dials started to lock up on one of the handles.I bring this up because I considered buying the version 2 Bowflex Selecttechs but because of the above concerns about reliability, lack of longevity, and the constant concern that the weights would come loose, I decided against giving Bowflex more of my business.
Just as quick to change the weight in 2.5lb or 5lb increments as it is by 10lbs or more.Cons: Takes significantly longer to change the weight than PowerBlocks. For press exercises I find this to be less of an issue, but for curls and other quick change exercises it's a bit of a pain. No locking mechanism for the screw in pins. This has never been an issue, or caused a dumbell to fall apart during use, but there's no locking mechanism (or magnet such as PowerBlocks) just friction preventing the pin from unscrewing.
These dumbbells are constructed using the best materials and the craftsmanship on these is unbelievable. The only issue I have is with the rubber mat that sits on top of the stand, I've only had this thing for about a month now and it's started to peel at the edges a bit. Since this isn't really a huge deal, I'm not knocking off a star for that simply because everything else with this product is excellent.Initially i had a little trouble getting the hang of the locking mechanism. It's great don't get me wrong but when unscrewing the locking pin, pulling it out can be a little tricky at times, otherwise once it's seated properly and tightened, it feels like welded steel.
Bowflex) but no locking mechanisms to break on these. They go to 75 lbs which most do not. Shipping was as good as others have posted. I had them in 4 days... and they delivered it on Saturday. Superbench is rock solid. The ability to go from military press to severe decline press (and have that double as a situp bench) is awesome. Crunch attachment feels a little flimsy but no problems as yet. Pullup bar works well but I am concerned over the stress placed on the joint where it attaches.
I own both Powerblock Urethane series (Stages 1, 2 and 3, as well as the U-125 stand) and I own the Ironmaster dumbbells with the first add-on kit (bringing up to a rated..120lbs? ).I use and enjoy both systems; they're both different/unique in their own way.The Powerblocks in general (it depends) are faster for me to change weights; however the IM's have smaller/more increments compared to the PB's.Also, life time warranty! !Also, the IM's were HUNDREDS of dollars cheaper than the PB's, and it's even more apart if you include the price of the rack/stand for the PB's.Things I've noticed with the IM's is trouble with locking it at times; also, if you turn the pin to try and lock it or w/e, pick the dumbbell(s) up and put it/them back down, the dumbbell may loosen some; so try and tighten it again; do as many times until it seems like the dumbbell doesn't budge.
Anything within 60 seconds is fine with me.If you're looking for dumbbell sets, your choices are:1. Individual dumbbells (most convenient of all, but more space required, and it's a lot of total weight)2. Adjustable dumbbells with a switch or pin (faster than Ironmasters, but not nearly as easy to use in the motions, and not as safe/solid)3. Ironmasters (more professional but slower than the other adjustables)In my opinion, the Ironmasters are the best value, certainly one of the best value purchases I've made in a long time.
These dumbells lock up as tight as solid gym DBs, so they can be used safely and quietly for  explosive work like full-body swings. They have  perfectly proportioned handles that comfortably accommodate one and two-handed work, and compact square plates that are heavier than they look. Asymetrical loading for leverage work is  easy and stable. The wide, flat inner permanent collars and big, flat-head, quick-lock pins make them comfortable in many positions not possible with other models: Horizontally and vertically, they're stable on the floor, and the ends can be held with palms up, between feet, knees, thighs for a great variety of  movements.
Answer: yes