Cheston Rotary Hammer Drill Machine 20MM 500W 850RPM with 3-Piece Drill Bit (Pack of 5) B2B Bundle ROTARY HAMMER DRILL: 500W heavy duty hammer drill with 850 RPM. The 20mm Hammer Drill is Ideal for both Home & Professional Masonry, Concrete, Natural Stone work , Metal and drilling anchors and fixing holes. SDS 20MM DRILL: Max drilling diameter for concrete is 20mm, wood is 30mm and for metal is 13mm. SDS rotary hammer for easy hammer drilling. Sturdy motor with a copper armature. INCLUDED COMPONENTS: 5 Rotary Hammer Drill, 5 Depth gauge, 6mm, 8mm, 10mm drill bits, BMX Tool Box with every drill 2-in-1 MODE: The Rotary Hammer comes with both Hammering & Drilling Function for your different needs. Lock-on button for continuous use. 6 Month Manufacturing Warranty.