"these clamps are as good as most you can buy, and represent good value for money. I think they are superior to the wood or aluminum type, being made of steel and iron, and will serve the diy,er or light tradesman well, If i was using sash clamps all day i would go for record though,still number one but double the price"
"This is a recommended product, but only just. The clamps work fine, but mine we're covered in black grease and this took some cleaning off. Even when cleaned the clamps left grease marks everywhere. I now have black marks on my timber which will require sanding off. Spirits doesn't clean off all the marks. Only buy of you have plenty of time or don't mind the mess.
That aside the clamps are robust and work well. They are easy to operate, but then they are only clamps so how hard can it be. The only tricky part I found was when I wanted to add a spacer block in between the clamp and my wood to avoid clamp marks on the timber. Getting everything aligned and in place requires an extra hand so this bit can be fiddly.
On the whole not bad, but at 20 quid for a pretty basic bit of kit these are a little pricey."