Hi @laury45013
I don't think that it is included in the Mako 64 bit kit.
The Mako Precision kit 64-bit if this is what you meant by b-stock has a magnetic case (see Innovative Organization section) which holds the bits in place, whereas the magnetic pad is a replacement magnetic sheet for the fabric case of iFixit's Pro Tech Toolkit. To quote the description: "This magnetic sheet holds the Mako driver case in place".
If you meant the Mako driver kit - refurbished it is the same as the Mako Precision kit 64-bit, only refurbished parts instead
Hopefully this clarifies it for you as to what it is for.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
1