As a compact 4" length and 1" thick driver handle, this set can be uesd in even the tightest of spaces, especially in awkward places like U shape corner, lateral surface, etc. Traditional ratcheting screwdriver or stubby screwdriver might be too large or bulky to fit, but this set of product is rendering easy fastening and unfastening with sufficient torque. 4 Pieces-Phillips Bit (#0, #1, #2, #3); 4 Pieces-Slotted Bits (3mm, 4mm, 5mm and 6mm); 7 Pieces-Torx Star Bits (T7, T8, T9, T10, T15, T20, T25); 6 Pieces-Hex Bits (H2, H2.5, H3, H4, H5, H6); And 1Pc 6.35mm ADP. The 36-teeth reversible ratchet system made of chrome vanadium steel is adopted in this multi pointed right angle combination screwdriver set, which can ensure the smooth rotation of the bidirectional ratchet and make more accurate adjustment than the 12-teeth one. You can adjust the direction by simply dialing the spin button buring use. The magnetic bit adaptor ensures that any 1/4" hex bit can be firmly secured for higher torque. The miniature pocket size close-quarters bit driver has magnetic like clip inside the hex bit holder help keep the inserted bit tight in position and no falling. This set performs well in confined locations on machines, cars, boats, plane, RV, etc, or for household or work with “tight fit” repairs, installations or renovations. This mini ratchet driver includes 21 size of the most commonly used bits, almost covers the screw sizes required for most household appliances, automobiles, houses, machines and other equipment. Also a nice gift for professional handymen and do-it-yourselfers. And always wear eye protection when you working to reduce the risk of injury, keep away from children.