Bosch Custom case 40 Piece 1 4 in Impact Driver Bit Set Paint Mixer Durable build supports everyday use Item Weight:3.526 Durable build supports everyday use across entryways prevent "springy" effect when walking along with less heat for long life Tilt in tilt out case mechanism – allows easier access to bits Customized storage configuration – provides efficiency so the right bit is always at hand Precision engineered driver bit tips – deliver a tighter fit and less cam out Heat treated bit manufacturing – provides stronger bit High visibility bit markings – makes finding the correct bit for the job easier Durable case – features a secure case latch and rubber bumpers Impact Tough™ bit design – both driver and drill bits are impact rated and provide longer bit life than standard impact bits Driver bit Xtended Torsion Zone – helps to absorb high torque of new impact drivers Black oxide coating on drill bits – provides lower fiction