About this item Compact Size: The 4" long 3/8" thick driver handle is small for operation in confined places/ tight spaces/ tight spot where traditional bit driver, traditional ratcheting screwdriver or stubby screwdriver might be too large or bulky to fit, rendering , fastening and unfastening with sufficient torque, especially in awkward places like U shape corner, lateral surface, etc. How it works: This multi tip right angled combination screwdriver set is powered with a 16-teeth reversible ratchet system to ensure smooth ratcheting in both directions and enable precision adjustment; and 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 Compatible for Various Usage: The lightweight magnetic bit adaptor with higher levels of torque accepts any 1/4 inch hex bits of all styles. This whole 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, making it good option as part of an EDC and also a gift for professional handymen and do-it-yourselfers; this can also be transferred to a ratchet socket using adapter Extra 10 Popular-Size Bits: Made of CRV6150 (chrome vanadium) steel with hardness of HRC51-55, bits in this set includes #1(2pc), #2, #3 phillips head bits, #1, #2 pozidriv head bits, 4.5mm, 7mm slotted head bits, and T15, T20 torx star screwdriver bits, coming with a cartridge as a good screwdriver bit organizer Operation ; With just one click, you will be able to easily switch between loosening and tightening a screw without need to rotate the whole screwdriver.