MYLEK 4ORCE: Manufactured with high quality materials. Manufactured with Tungsten, HSS and CRV materials which helps retain good durability even when used in the toughest of conditions, using high quality materials enable the screwdriver bits and drill bits to perform and offer longer life and durability than standard sets CONTENTS 1: 1pcs countersunk: material is #45 carbon steel, HRC 42-48 / 9pcs nut driver: material is 50BV30 finishing sand blaster, HRC 42-48: 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0mm / 1pcs magnetic holder: shaft material is #45 carbon steel, HRC 42-48 / 5pcs screw driver bits: material is CRV6150, finishing is sand blaster, HRC 48-51, 25mm, CRV6150: T15, T20, T25, T30, S1 / 3pcs flat wood bits: 13, 16, 19mm CONTENTS 2: 60pcs wall plugs: material PP, grey colour, different sizes assorted / 1pcs gauge ruler / 5pcs screw driver bits: material is CRV6150, finishing is sand blaster, HRC 48-51, 25mm, CRV6150: 4.0, 5.0, 6.0mm, S2, S3 / 12pcs 50mm,screw driver bits: material is CRV6150, finishing is sand blaster, HRC 48-51: 50mm, PH1 PH2, PH3, PZ1, PZ2, PZ3, 4.0mm, 5.0mm, 6.0mm, T15, T20, T25 / 5pcs wood working drill: #45 carbon steel roll forged, black and white: 4, 5, 6, 8, 10mm CONTENTS 3: 5pcs masonry drill bit: shaft material is #45 carbon steel, ip material is tungsten carbide YG8C4.0, 5.0, 6.0, 8.0, 10.0mm / 5pcs screwdriver bits: material is CRV6150, HRC 48-51, 25mm, CRV6150: PZ1x2, PZ2x2, PZ3 / 11pcs HSS twist drill bits: raw material is HSS 4241, titanium coated, edge ground, 118 tip angle, HRC60-63: 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5mm / 5pcs screwdriver bits: material is CRV6150, HRC 48-51, 25mm, CRV6150:PH1x2, PH2x2, PH3 WARRANTY: The Drill Accessory Set with carry case is fully backed up with a 2 Year Warranty and excellent UK Customer Service Centre contactable by Email or telephone, Manufacturer: MYLEK