White. The KICKSTOP Universal StapleGuard is a four bolt steel StapleGuard suitable for most sizes of staple and is used to reinforce and strengthen wooden door frames. It is 20mm wide and features a universal 'D' shape staple to fit over lock staples (keeps) which are 30mm x 97mm (or less) - the fixings allow for an adjustable internal size of between 70mm and 97mm, making this the perfect choice if you are unsure whether your application requires a standard or large size staple.. Four bolt steel StapleGuard. Suitable for most sizes of staple. 20mm wide. Used to reinforce and strengthen wooden door frames