The Bosch PRO SDS max-4 in 20mm diameter and 320mm length is a practical option for larger anchor points and conduit holes in reinforced concrete, with a shorter length ideal for tighter working environments. Features and Benefits: • Lasts up to 1.5x longer than a Bosch SDS max-2 drill bit • 4-cutter head resists jamming and breakage on rebar • Deep flute channels for effective dust and chip removal • High-quality tungsten carbide for lasting durability • Fits all SDS max rotary hammers Specifications: Diameter: 20mm Length: 320mm Contents: • Pack of 1