Hi, I have a M8 Raw Bolt and the outer shell is approx. 13.6mm x 49.5mm, the bolt is M8 x 94mm. If I use a 12 mm Masonry drill bit do I drill the hole to 94mm or 49.5mm then use a M8 Masonry drill to drill the rest of the hole 45mm to cater for the length of the Threaded Raw Bolt?