Philips OneBlade QP210/51 is a genuine replacement blade for Philips OneBlade handles (note: this is the replaceable head, not the trimmer handle).
Key features: Fits all Philips OneBlade handles; trims, edges and shaves hair of any length; dual-sided blade with dual protection system for comfort on sensitive skin; works wet or dry, with foam or gel, or in the shower; rated for about 4 months of use at two full shaves per week.
Compatible with OneBlade handles such as QP1424/10 and QP2724/10.