Premium high quality drill bit set for all drilling and screw work this professional quality bit set includes a wide range of drill and screw bits made from robust titanium each bit included in this set is commonly used among all trades making this an ideal set for all homes and workshops includes 11x hss tin metal drill 1 5 6 5 mm diameter 4x hm stone drill 4 5 6 7 mm diameter 4x wood drill 4 5 6 8 mm diameter 10x screw bits length 25 mm ph1 2 3 pz1 2 3 sl 4 6 t20 25 1x univer