The springs were presented accurately and fitted perfectly to replace my chopper blade. They used to be available locally but are now only available online, and the old-style Entspreu Blade is also no longer available locally but online. There's a cheaper type in my area now at home centers with short but replaceable plastic pins for about $30. But these metal spring pins do their job perfectly and last a long time. This year I didn't have a straw blade because the springs wore out and one of them broke so I rented a gas powered straw remover for only $25 and it did the job well but was overly aggressive and aggressive. left a few scalped sections of lawn that I had to replant. And the car was VERY heavy. The chopper blade fitted to a standard mower is much easier to control and a throttle mower is best suited to utilize maximum chopping power.