Screw hole spacing will match the receiver (.860" front and rear).
It is one bolt per mount.
High rings should accomodate your 56mm objective scope just fine.
The Talley Tikka T1x Scope Mount I would recommend for a 40mm objective is low height mount. Typically 40-42mm is a low mount/44mm is a med mount/50mm is high/and 56mm is extra high. However, It depends on what rifle its being used with and will vary from gun to gun. For example, AR15 style rifles and pistols should use a medium mount at the lowest due to the way they are designed. I would recommend emailing us at Techsales@opticsplanet.com to let us know what specific rifle you are using, if you have a picatinny mount for it, or if it has a top Pic rail already etc. That way we can accurately recommend the correct rings for your application.
The Talley Tikka T1x Scope Mount I would recommend for a 56mm objective is high or extra high. It depends on the rifle it is being used on. Typically 40-42mm is a low mount/44mm is a med mount/50mm is high/and 56mm is extra high. But like I said, It depends on what rifle its being used with and will vary from gun to gun. I would recommend emailing us at Techsales@opticsplanet.com to let us know what specific rifle you are using, if you have a picatinny mount for it, or if it has a top Pic rail already etc. That way we can accurately recommend the correct rings for your application.
Ring height is Medium for an objective lens of 44
The height you want is High for 50mm scope.
Yes this is sold together. Two per pack and not individual rings
Yes, you can find that set here: https://www.opticsplanet.com/talley-950734-hi-rings-base-set-weatherby-vanguard-1-quot-style-black-finish.html