Product description Key benefits — why you need this tool Durable, corrosion-resistant construction: aluminum alloy body with 304 stainless steel components and stainless steel screw provide high strength and long service life in workshop conditions. Protects bearings and frames: the pressure-block and recessed table design prevent direct pressure on bearings during installation, reducing the risk of damage. Faster, easier installations: built-in lubricated ball bearings and a smooth thrust surface reduce effort and make pressing operations more stable and repeatable. Versatile fit: CNC knurling with a tight, thin pitch accommodates most head tube lengths and supports a wide range of press-fit use cases. Product features Materials: aluminum alloy main body; 304 stainless steel components; stainless steel screw; removable handle. Rust-proof and corrosion-resistant. Size: 26 x 24.5 x 5.5 cm (10.23 x 9.64 x 2.16 in). CNC knurling design: precise, tight knurl pattern for reliable grip and concentric pressing; flat thrust surface for even force distribution. Pressure-block design: reverse side configured for assembling press-in bottom brackets; recessed (sinking) table prevents direct pressure on bearings during installation. Ball bearing-assisted operation: lubricated balls reduce friction and hand effort, improve stability and minimize the chance of over-compressing parts or damaging the frame. Removable handle: simplifies storage and transport; screw fastener made of stainless steel for secure assembly. How it solves common problems Prevents bearing and frame damage by channeling force through a recessed pressure block rather than pressing directly on bearings. Reduces user fatigue and inconsistent results thanks to the lubricated ball-bearing thrust mechanism. Fits most head tube lengths and typical press-fit components because of the CNC knurled design, improving compatibility across different bikes. Typical use scenarios Headset installation: press headset cups into road or mountain bike head tubes with even force and reduced risk of misalignment. Press-fit bottom bracket assembly: use the reverse-side pressure block to seat press-fit bottom bracket bearings without applying damaging pressure to the bearing surfaces. Workshop maintenance and bike builds: repeatable, reliable pressing for routine service, component swaps, or building a new frame. What to expect in use Stable, low-effort pressing thanks to lubricated ball-bearing thrust. Consistent alignment from the CNC knurled contact surface. Corrosion resistance and mechanical durability from stainless steel and aluminum alloy construction. Compact footprint (26 x 24.5 x 5.5 cm) and removable handle for convenient storage. Specifications Materials: aluminum alloy body; 304 stainless steel parts; stainless steel screw; removable handle. Dimensions: 26 x 24.5 x 5.5 cm (10.23 x 9.64 x 2.16 in). Intended functions: press-in assemblies for head tube/headset and press-in bottom brackets (reverse side). This tool is designed to provide a reliable, frame-safe, and labor-saving method for pressing headset cups and press-fit bottom bracket bearings while remaining compact and durable for shop or home use.