Spearhead High Speed Steel Ball Bur Master Kit of 33 Pieces Prop 65 - Nickel-Cobalt-Cadmium this chain is ideal for

this chain is ideal for jewelers who need working stock in quantity

Model PM-350 Motor Power 1/2 HP Speed Range 0–3600 RPM Speed Type Variable Shaft Diameter 1/2" Spindle Type Tapered (left and right) Overall Width (tip to tip) 16

Supports smooth axial load management during rotary operation

and performing a wide range of smithing tasks — all at a smaller scale than traditional silversmithing stakes

and corners

Spearhead High Speed Steel Ball Bur Master Kit of 33 Pieces Prop 65 - Nickel-Cobalt-Cadmium this chain is ideal forImportant Notice: This set will ship incomplete. Due to ongoing supply constraints, Spearhead has been unable to fulfill all sizes in this kit as ordered. Otto Frei will contact you with the exact burs in stock, the sizes unavailable, and an updated reduced kit price at the time of your order. We are not back ordering missing sizes, as restocking timelines are unknown and inventory returns randomly. For reference, as of 7 29 2026, 23 of the 33 sizes