Keelboat Parts

Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications. Wire Bullet blocks use roller...

Midrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load. ONE DESIGN APPLICATIONS This fitting...

A 75 mm carbo block with swivel from Harken. Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe,...

40mm ball bearing block from Ronstan in triple block with swivel head configuration. This 40mm range features sheaves running on Acetal bearings that provide high performance & low friction. The 2-stage ball bearing system provides consistent...

Ronstan ball bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball...

Ronstan ball bearing Orbit Blocks boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball...

The Ronstan 20 mm Utility Block range featues stainless steel cheeks and Acetal sheaves for a long service life with virtually no maintenance. This ferrule top version features a narrow attachement point for small spaces. Hollow rivets in the block heads...

The Ronstan T-Cleat medium cam cleat is the product of intensive development efforts, producing a range of cleats that provide unbeatable holding power, yet are designed for easy cleating and releasing of control lines in every application and load...

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave: 40 mm / 1 9/16 in...

The Ronstan 30mm Orbit block is small and compact. Used on high performance boats, these blocks are used by the best and perform for the best. Made from advanced fiber and polymer technology, these blocks are ten times stronger than steel, yet more...

Ronstan's ball bearing blocks were conceived and engineered for the demands of competitive sailing in all types of boats and have rapidly become the international choice for high performance hardware. Highly efficient, low friction bearing systems for...

Harken ball bearing cam cleats hold lines securely and release instantly for easy, precise trimming. Aluminum Cam-Matics are hardcoat-anodized for high-load, high-wear, continuous adjustment applications.. Height (mm)22 mm Height (in) 7/8 in Length...

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave: 40 mm / 1 9/16 in...

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave: 57 mm / 2 1/4 in...

Ball bearing swivel bases feature dual rows of Delrin ball bearings that swivel freely even under high loads. Bases include stand-up springs and a U-adaptor to accept a variety of appropriate blocks. The low profile 205 is used when installation is at...

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Sheave: 29 mm / 1 1/8 in...