"Please have products tested and iron out problems that can be easily solved with simple changes. This product fails because a clockwise spiralled spring is used instead of an anti-clockwise spiralled spring. The spring keeps catching on the gap in the circlip and jamming the 'plunger' around the drill-bit. Either change direction of the spring or use a shoulder without a circlip. Either will solve the problem anf make an excellent product."
"Screwfix need to get some quality bit sets in , the springs keep sticking and you cant find replacement drill bits at screwfix , you have to buy a HSS drill set to get the 3 you need as replacements,,,dont waste your money"