Individual drill bit part numbers follow this numbering sequence; KTIXD3107 is 1/16", KTIXD3108 is 5/64", KTIXD3109 is 3/32". KTIXD3133 is 15/32", KTIXD3134 is 31/64", KTIXD3135 is 1/2". The Speedy Tip design eliminates the need for pilot holes and prevents the bit from walking on curved surfaces.
