The Pilot Drill Bit HSS Co delivers more robustness and precision than its predecessor. Its large diameter results in higher durability and 3x higher speed and lifetime due to its tip design. Furthermore, it offers improved guidance when drilling, for results that are more accurate. The tool can also be used for drilling centre holes in preparation for stable work with other hole saws. This bit is especially suited for metal and stainless steel, due to its long lifetime. The EXPERT Power Change Plus adapters allow for quick and easy switching of hole saws, thanks to Bosch's one click arbour. The key-less system does not require fixing with screws or bolts, instead the simple mechanism only requires the user to pull one saw or bit out, and insert the other. This keyless system does not require fixing with screws or bolts. You just pull one hole saw out and push another in. With a reinforced shank and close-fitting guide drill, the adapters ensure a consistently firm fit. Features and Benefits: Up to 5 times faster than a standard adapter. Maximum efficiency and ease of use. Consistent accuracy and robustness. Typical Applications: Ideal for changing hole saws quickly and easily. Quick Change System for more efficiency. Hole saws are a great accessory, but attaching them to your drill was always a fiddly job to do accurately. This costs professionals time and money. With the EXPERT Power Change Plus, you can switch hole saws in seconds thanks to Bosch’s clever one click arbor. This keyless system does not require fixing with screws or bolts. You just pull one hole saw out and push another in. Despite this apparent simplicity, the EXPERT Power Change Plus still gives a firm connection: with a reinforced shank and close-fitting guide drill, it actually has less play than conventional systems. The Bosch EXPERT Power Change Plus Hole Saw System is designed to give hole saw users the best connection with the maximum efficiency. It will save you time and perform the roughest tasks to a high standard. For use with the Bosch Power Change Plus keyless arbor: offering accuracy and robustness. Tested in Bosch labs according to Bosch standard procedures. Features and Benefits: Quick Change System for more efficiency. Enjoy maximum efficiency with one of Bosch’s Quick Change systems. For use with the Bosch Power Change Plus keyless arbor: offering accuracy and robustness. Pilot drill fits PC Plus arbor, for use with Expert Tough Material and Construction Material hole saws with a cutting depth of 60 mm. Best for tradesmen: fast and efficient. Specifications: Diameter mm: 7.15. Shank, shape: Hexagon. Total length mm: 105. Working length mm: 60.