Price: Unbeatable. Material: Solid Steel and heavy like it should be. Operation: Easy- Usefull for any type of small precision works.
I use for final adjustments in high precision mechanics for High tech optomechanic Equipments which a standard vise wont help due to complex shapes. Acessories: sufficent for most aplications- but a bonus you can make up your own which fit custom to the support..
The base in heavy hard rubber - well designed with running surfaces points integrated.
The ball is in two parts and permitts rotating of upperhalf which is another bonus. Surfaces hardchromed so no rust here.
In all . This product is a very well designed tool from the traditional old ball vises. Comparing the price- this tool cost at least a third form the traditional ones and has at least 6 times or more versatility than the compercial traditional ones. Its heavy (9kg) but if you are a Pro and want to work without hassle, buy this one , the lighter ones may not be that stable as this one and its a lifetime investment. to break it only with brute force or a sledge hammer and then even it can be fixed. for me its perfect and worth every Euro .