SDS Plus, ensures maximum power transmission due to its unique fluted shaft. This effectively removes situations where a perfectly serviceable cutting edge is rendered useless by a worn shank. The SDS Plus system also enables faster changing of drills using a quick release keyless chuck. Heavy-Duty. Tungsten Carbide tip.SDS-Plus Fitting 11 piece masonry drill set , assorted sizes and lengths. Contents: 1 x 5 mm x 110 mm1 x 6 mm x 110 mm1 x 6 mm x 160 mm 1 x 8 mm x 160 mm1 x 10 mm x 160 mm1 x 10 mm x 450 mm2 x 12 mm x 210 mm 1 x 12 mm x 450 mm 1 x 18 mm x 450 mm 1 x 20 mm x 450 mm