Our M18 4-Tool Combo Kit includes the M18 Compact Brushless 1/2 in. Hammer Drill, M18 Compact Brushless 1/4 in. Hex 3-Speed Impact Driver, M18 Brushless 7 ¼ in. Circular Saw and M18 Hackzall. The Compact Hammer Drill is 5.8 in. L and lightweight at 2.3 lbs. without a battery allowing for excellent control, especially while working in overhead or tight spaces. Our cordless 3-Speed Impact Driver measures only 4.4 in. L and 2.1 in. W, allowing for better access in tight spaces while being lightweight and portable. The Brushless 7-1/4 in. Circular Saw delivers up to 40% more power than circular saws with brushed motors while giving you up to 30% more run-time. The M18 Hackzall gives you 0-3,000 strokes per minute while its 3/4 in. stroke length allows you to perform fast cuts through a wide range of material such as wood, metal and PVC. The REDLINK Intelligence optimizes the way our M18 REDLITHIUM batteries work with the tools for best-in-class performance. This kit includes (1) M18 REDLITHIUM XC4.0 Battery Pack, (1) M18 REDLITHIUM CP2.0 Battery Pack, M18/M12 Multi-volt Charger and Contractor Bag. The M18 4-Tool Combo Kit is part of our M18 system, fully compatible with over 250 plus solutions.