Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Do these come in pairs or a single clamp?
Document: They are constructed of hard plastic with rubber non-slip pad inside the collar. The clamps tighten and loosen with a quick 1/4 turn of the clamp lever.These clamps are perfect. Easy on easy off. I have bought two pairs, one to keep on my bench and the others on my curl bar.I was doing bench and had 110lbs (265 total lbs.) on each side with these clamps on. I had to dump and the clamps held the 110lbs.
I first came across MuscleClamps while doing Crossfit. After switching to more weightlifting (in a different gym, where they don't have this type of clamp) coached by my husband, I ordered 2 pairs of MuscleClamps - one pair for him, one pair for me. They work absolutely great - lighter and heavier weights, no problem. Very easy and fast to put on and take off, and they hold the weights securely. Can highly recommend! (So sorry for the person who received the wrong product twice.)
A quick and easy clamp to put on and take off. Best clamp I have ever used.
Quick and easy to change plates. Very durable, I've had my first pair for almost ten years now and I use them a lot. I had one come apart once when drop an empty oly bar on it. Snapped it back together and it works fine.
they look cool and they work great I would recommend this product.I am looking forward to buying another pair of muscle clamps.
We bought for for our son at Christmas per his Wish list request. He loves it so we're happy too!
Want quick on and off from barbell? This is amaizing. I wish every gym has them. Be carefull. Olympic and 2 inch isnt the same radius
These work like a charm and allow a much faster transition between sets when change the weights! Only had them for a week, so I can't speak to quality. However, I used these in Iraq where they were abused and the only time I saw them break was when someone dropped a plate on them.
These muscle clamps are the best collars I've used. They're extremely sturdy and don't feel flimsy at all, and are much easier to use than springs on a rusty bar, for instance.Taking one star away due to the high price.
These clamps fit my Olympic-style barbell and adjustable dumbbells securely; they're able to hold about 30 pounds vertically without slipping. They're also much easier to operate than our old metal clamps, which my wife often struggled to use. These are a bit pricey, but I'm happy with the purchase.
Answer: yes