We use a hammer drill manufactured by Hilti (TE 50 Deluxe Grounded Combihammer, item # 383916), with hammer drill bits TE-YX 5/8 inch x 22 inch (item # 206514) and TE-YX 1-1/2 inch x 23 inch (item # 293032). Available by calling 1-800-879-8000 or by clicking here
. Comparable drills and bits are available from other manufacturers as well.
For metric measurements – Use 16mm for the pin and 38mm for the covers., we suggest 400mm cutting length for both sizes.