Master mechanic, 50 piece, assorted, impact bits in plastic case, set consist of 1 each: compact magnetic bit holder, 1/4" nut driver, 5/16 nut driver, 3/8" socket adapter, ph1 insert bit, pr2 insert bit, sq1 insert bit, t30 insert bit, slotted #6 insert bit, slotted #8 insert bit, slotted #10 insert bit, 1/8" hex insert bit, 5/32" hex insert bit, 3/16" hex insert bit, 1/4" hex insert bit, sq3 insert bit, t15 insert bit, ph3 power bit, sq3 power bit, t15 power bit, t30 power bit, slotted #10 power bit, titanium red helix bits sizes: 1/8", 5/32", 3/16" & 1/4", ( 2) double ended power bits, (3) ph2 insert bits, (2) ph3 insert bits, (3) sq2 insert bits, (2) t20 insert bits, (2) t25 insert bits, (3) ph2 power bits, (3) sq2 power bits, (2) t20 power bits & (2) t25 power bits.