"This is a pretty 'vanilla flavoured', magnolia painted product to be honest but it does what it says on the pack.
Easy to fit. Reasonably easy to use, as long as your sashes are in passably good condition. Hard to imagine anyone getting past them without causing fairly serious (noisy) damage, so I guess they work pretty well."
"These sash bolts were easy to fit, clear instructions. It took longer to clear the window shelf than it did to fit the bolts. Two tips: make a jig so that holes are in the same place to each edge of the sash and make sure your top sash can pass the bottom of the inner sash or has a removable inner sash, so you can fit the small brass collars to the outer sash."